Veranstaltungsarchiv

11.07.2024, 16:15 Uhr  –  1.10
Forschungsseminar Differentialgeometrie

LEAN 4 proof assistant: first steps

Christoph Stephan

I will give an introduction to the Lean 4 proof assistant, focusing on basics of interactive theorem proving, dependend type theory and its applications in mathematics. The talk will be suitable for... 

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10.07.2024, 14:00 - 16:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Group theory meets Hilbert spaces

Piotr Nowak (Warsaw), Adam Skalski (Warsaw)

14:00  Adam Skalski (Academy of Science, Warsaw):  Haagerup property: groups and operator algebras.
14:45
  Tea and Coffee Break
15:15  Piotr Nowak (Academy of Science, Warsaw):  Rigidity results for... 

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04.07.2024, 16:15  –  Raum 1.10 und per Zoom
Forschungsseminar Differentialgeometrie

Timelike Ricci bounds and Einstein's theory of gravity in a non smooth setting: an optimal transport approach

Andrea Mondino (Oxford)

Optimal transport tools have been extremely powerful to study Ricci curvature, in particular Ricci lower bounds in the non-smooth setting of metric measure spaces (which can be been as a non-smooth... 

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03.07.2024, 10:15  –  Haus 9, Raum 2.22
Forschungsseminar: Gruppen und Operatoralgebren

Functoriality for groupoid C*-algebras

Jonathan Taylor (University of Potsdam)

Groupoid homomorphisms do not, generally, lift (functorially) to *-homomorphisms of the associated C*-algebras. The crux of this lies in the fact groupoids span a class of objects ranging from groups... 

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02.07.2024, 16:15 Uhr  –  Raum 2.22, Haus 9 (Institut für Mathematik)
Informationsveranstaltung

Arbeitgeber stellen sich vor: Unternehmensberatung d-fine

Franziska Krüger (Senior Manager bei d-fine) & Max Lewandowski (Senior Consultant bei d-fine)

d-fine ist ein europäisches Beratungsunternehmen mit Fokus auf analytisch anspruchsvolle Themen, die von einem mathematisch-naturwissenschaftlich geprägten Team bearbeitet werden.  Franziska Krüger... 

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28.06.2024, 14:30  –  Campus Golm Building 9 Room 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Algebraic Properties of Subsemigroup of the Symmetric Inverse Semigroup

Apatsara Sareeto

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27.06.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Fill-ins, Dirac eigenvalues and the hyperspherical radius

Christian Bär (UP)

Let \(M\) be an n-dimensional closed Riemannian spin manifold. A fill-in of \(M\) is a compact (n+1)-dimensional Riemannian spin manifold \(X\) whose boundary is \(M\). If \(X\) has nonnegative scalar... 

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26.06.2024, 13:00 - 16:30  –  Campus Golm Haus 9 Raum 2.22
Workshop

MATH 4 MASTER

Mathematics by master students for master students.

Schedule: 

13:00 - Hans Riemann “A Novel Approach to Sequential Change Point Detection in Dynamical Systems - Investigations at an Origin of the... 

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26.06.2024, 17:30 Uhr  –  Haus 25, Raum F1.01, Campus Golm
Antrittsvorlesung

Über die Zerlegung von Symmetrien diskreter Strukturen

Sven Raum

Ein Livestream zur Vorlesung wird zu gegebener Zeit auf der Webseite bereitgestellt.

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26.06.2024, 11:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

A stability phase transition for cosmological fluids

David Fajman (Universität Wien)

Abstract:

Fluids are generally known to form shocks in finite time from small inhomogeneities. When the fluid evolves in an expanding spacetime, as in standard cosmology,

the expansion of spacetime... 

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26.06.2024, 10:15  –  Haus 9, Raum 2.22
Forschungsseminar: Gruppen und Operatoralgebren

Higher Kazhdan projections and delocalised ℓ2-Betti numbers

Hang Wang (East China Normal University)

We introduce the K-theory class of higher Kazhdan projections and its relation with a variant of Lott's delocalised ℓ2-Betti numbers. We will also relate the K-theory class of higher Kazhdan... 

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21.06.2024, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

When the Lie group exponential is bad

Alexander Schmeding (Trondheim) via ZOOM

From finite dimensional Lie theory, it is well known that the Lie group exponential yields a local diffeomorphism from the Lie algebra onto a unit neighborhood of the Lie group. These exponential... 

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20.06.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Green Operators on Static Spacetimes with Timelike Boundary

Onirban Islam

I shall introduce the Chazarain method to construct retarded and advanced Green operators for a Dirac operator on a globally hyperbolic spacetime with timelike boundary.

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20.06.2024, 15:00 Uhr  –  Haus 25, Raum B0.01 Campus Golm
Forschungsseminar Mathematische Physik

Courant or Pleijel theorems for Hörmander's operators

Bernard Helffer

This is a hybrid talk. For Zoom login data please contact Elke Rosenberger.

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19.06.2024, 16:30 Uhr  –  Haus 10, Raum 0.25
Institutsveranstaltung

Absolventenfeier des Instituts für Mathematik

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19.06.2024, 17:30 Uhr  –  Grillplatz neben der Mensa (Campus Golm)
Institutsveranstaltung

Institutsfest des Instituts für Mathematik

Public Viewing: Das EM-Spiel läuft ab 18:00 Uhr auf großem Bildschirm!

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14.06.2024, 10:15 - 11:30  –  2.28.0.108
SFB-Kolloquium

Random walks of heterogeneous population and ensemble self-reinforcement

Sergei Fedotov, University of Manchester

The talk will be concerned with time-fractional master equations with random transition probabilities describing a heterogeneous population of random walkers. This formulation leads to an effective... 

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14.06.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

Universal central extensions of the Lie algebra of volume-preserving vector fields

Leonid Ryvkin (Lyon)

The goal of the talk is proving a conjecture of Claude Roger about the universal central extension of the Lie algebra of volume-preserving vector fields. In the beginning we will briefly review the... 

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05.06.2024, 14:00 - 16:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Variational problems for knotted curves and surfaces: how repulsive energies come into play

Heiko von der Mosel (University of Aachen), Henrik Schumacher (University of Georgia)

14:00  Heiko von der Mosel (University of Aachen):  On the Tangent-Point Energy.
14:45
  Tea and Coffee Break
15:15  Henrik Schumacher (University of Georgia):  Numerical Optimization of the... 

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05.06.2024, 10:15  –  Raum 2.22, Haus 9
Forschungsseminar: Gruppen und Operatoralgebren

Propagating the algebraicity of automorphic representations via functoriality

Wushi Goldring (Stockholm University)

My talk concerns the algebraic properties of automorphic representations. These infinite-dimensional representations of reductive groups over number fields are defined using harmonic analysis.... 

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04.06.2024, 16:15 Uhr  –  Raum 2.22, Haus 9 (Institut für Mathematik)
Informationsveranstaltung

Praktikum bei KPMG: Ein Erfahrungsbericht

Kolja Wichmann

Kolja Wichmann hat nach seiner Bachelorarbeit ein Praktikum bei KPNG gemacht und arbeitet jetzt parallel zu seinem Masterstudium bei KPMG in Teilzeit. Er wird kurz (20-30 Minuten) über sein Praktikum... 

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31.05.2024, 14:00 Uhr  –  Raum 2.22, Haus 9 (Institut für Mathematik)
Verteidigung der Dissertation / Defence of the PhD thesis

Hardy Inequalities on Graphs

Florian Fischer

Disputation zur Dissertation "Hardy Inequalities on Graphs" aus der Wissenschaftsdisziplin Diskrete Mathematik.

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31.05.2024, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

From the Mini-Max principle to the geometry of Newton polyhedra

Luisa Herrmann (Uni Potsdam)

We will introduce the notion of Newton polytope and then prove  a result on normal vectors to polyhedra built from Newton polytopes. For this we follow a proof by Thierry Champion using the Mini-Max... 

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29.05.2024, 14:00 - 16:00 (Special session)  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Mathematical structures from studying and counting points

Abhiram Kidambi (Leipzig), Noah Arbesfeld (Vienna)

14:00  Abhiram M. Kidambi (MPI, Leipzig):  Computer assisted number theory: Past, Present and Future.
14:45
  Tea and Coffee Break
15:15  Noah Arbesfeld (University of Vienna):  Structures from points... 

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29.05.2024, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Quantum information scrambling and chaos induced by a Hermitian matrix (joint work with Uzy Smilansky)

Sven Gnutzmann

Abstract: Given an arbitrary Hermitian matrix, considered as a finite discrete quantum Hamiltonian, we use methods from graph and ergodic theories to construct a corresponding unitary scattering... 

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28.05.2024, 11:00 Uhr (exceptionally)  –  Campus Golm, Building 9, Room 0.13 and via Zoom
Arbeitsgruppenseminar Analysis

On the homotopy invariance of Lie algebroid cohomology

Rosa Marchesini (Göttingen)

Several extensively studied cohomology theories play an important role in differential geometry and mathematical physics. Examples are De Rham cohomology, Chevalley-Eilenberg cohomology, BRST... 

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24.05.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

Cotangent spaces for higher Lie groupoids and applications

Stefano Ronchi (Göttingen)

In the same way Lie groupoids can encode local symmetries of a manifold, Lie 2-groupoids are a way to encode higher symmetries. After a short crash course on this topic, we present the construction of... 

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24.05.2024, 10:00 - 11:30  –  2.9.1.22
SFB-Seminar

Reconstruction of electron radiation belts using numerical modeling, data assimilation and machine learning

Alexander Drozdov, University of California, Los Angeles

This seminar presented an overview of numerical modeling, data assimilation, and machine learning in understanding Earth's electron radiation belts. Central to the discussion is the Versatile Electron... 

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24.05.2024, 13:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

A leisurely stroll through the multisymplectic approach to Lagrangian field theories (continued)

Fabrizio Zanello (Universität Potsdam)

The mathematical toolbox of multysimplectic geometry was introduced in order to generalize the symplectic formulation of classical mechanics to Lagrangian field theories. After a substantial body of... 

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24.05.2024, 14:30 Uhr  –  Auditorium Maximum im Haus 8, Am Neuen Palais
Ankündigung

Euler-Vorlesung 2024

Alessio Figalli und Clara Silvia Roero

Die Euler-Vorlesung in 2024 wird von dem Mathematiker Alessio Figalli von der ETH Zürich gehalten. Den traditionellen historischen Vortrag wird die Mathematikerin Clara Silvia Roero von der Univerität... 

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23.05.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Transgressions of Characteristic Classes

Alberto Richtsfeld (UP)

In this talk I will report on my progress in computing the transgression forms for characteristic classes. First, I will compute the transgression form of characteristic classes of power sum symmetric... 

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22.05.2024, 10:15  –  Raum 2.22, Haus 9
Forschungsseminar: Gruppen und Operatoralgebren

Spectral triples for group C*-algebras from geometric group theory

Ada Masters (University of Wollongong)

Since Connes’s 1989 paper, the use of length functions to build spectral triples for group C*-algebras has become commonplace in noncommutative geometry. This construction, although sound at the level... 

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17.05.2024, 10:15 - 11:30  –  2.28.0.108
SFB-Kolloquium

Kernel Methods in Generative Modeling

Gabriele Steidl, TU Berlin

We consider gradient flows with respect to the maximum mean discrepancy (MMD) of certain kernels. For the efficient computation, we propose slicing techniques that restrict the kernel evaluations to... 

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17.05.2024  –  Raum 3.06.H01, Griebnitzsee
Workshop

BB-workshop III: Knot theory and its Applications

This is a one-day workshop aiming to bring together researchers and students from the Universities of Berlin and Brandenburg.

It is an opportunity to discover the latest advancements in research in... 

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17.05.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

A leisurely stroll through the multisymplectic approach to Lagrangian field theories

Fabrizio Zanello (Universität Potsdam)

The mathematical toolbox of multysimplectic geometry was introduced in order to generalize the symplectic formulation of classical mechanics to Lagrangian field theories. After a substantial body of... 

mehr erfahren

16.05.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Rigidity of initial data sets in Minkowski space

Christian Bär (UP)

If M is a spacelike hypersurface of a Lorentzian manifold, then M inherits an induced Riemannian metric g and a second fundamental form q. The triple (M,g,q) is then called the induced initial data... 

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15.05.2024, 14:00 - 16 00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Operator algebras and their classification

Karen Strung (Czech Academy of Science, Prague), Sven Raum (Potsdam)

14:00  Karen Strung (Czech Academy of Science, Prague):  Operator algebras arising from topological dynamics.
14:45
  Tea and Coffee Break
15:15  Sven Raum (Uni Potsdam):  Operator algebras from... 

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10.05.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

On a problem of optional transport under marginal martingale constraints

Luisa Herrmann (Universität Potsdam)

Based on an article by Mathias Beigelböck and Nicolas Juillet, I will first describe the martingale version of the optimal transport problem after which I will define the convex order and give some... 

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10.05.2024, 14:15  –  Haus 9, Raum 2.22
Forschungsseminar: Gruppen und Operatoralgebren

The Levi-Civita connection on noncommutative differential forms

Adam Rennie (University of Wollongong)

I will discuss the main results and consequences of recent workwith Bram Mesland. Using mostly algebraic techniques, with just a littleHilbert module analysis, we present necessary and sufficient... 

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08.05.2024, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Anti-Faber-Krahn property for the heat content on metric graphs (or “Building better batteries”)

Matthias Täufer (Hagen)

Abstract: We speak about the heat content at time t on metric graphs. This quantity measures how much mass of a constant initial configuration remains in the graph at time t under the action of the... 

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03.05.2024, 10:30  –  Zoom (email us to get the link if you are interested)
Forschungsseminar Statistik

Information Percolation for reconstruction problems on graphs

Luca Ganassali (Universite Paris Saclay)

We propose a method of proving impossibility results based on applying strong data-processing inequalities to estimate mutual information between sets of variables forming certain Markov random... 

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03.05.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

Construction of marginally outer trapped surfaces

Alejandro Peñuela Díaz (Universität Potsdam)

In physics, marginally outer trapped surfaces (MOTS) can be understood as quasi-local versions of black hole boundaries. Therefore, these surfaces are crucial to understand black holes and are widely... 

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26.04.2024, 15:00  –  2.09.0.14
Forschungsseminar: Gruppen und Operatoralgebren

Properties of affine cellular algebras

Christian Lomp (University of Porto)

Motivated by Lusztig's basis of Hecke algebras, Graham and Lehrer introduced cellular algebras in 1996. As a generalisation of Graham and Lehrer’s cellular algebras, affine cellular algebras have been... 

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26.04.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

Convergence results in the stochastic sine-Gordon model: an algebraic viewpoint

Alberto Bonicelli (Pavia, Italy)

The importance of the sine-Gordon model in 1+1 spacetime dimensions resides in the integrability of the field theory that it describes. A recent result showed how, within the setting of algebraic... 

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26.04.2024, 10:30  –  Zoom (please email us to get the link if you are interested
Forschungsseminar Statistik

Change point in the preferential attachement model

Ibrahim Kaddouri (Universite Paris Saclay)

Motivated by the problem of detecting a change in the evolution of a
network, we consider the preferential attachment random graph model with
a time-dependent attachment function. Our goal is to... 

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25.04.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Atiyah-Singer-Indexsatz

Lennart Ronge (UP)

Vorbereitung auf das Blockseminar "Geometrie" nach dem Inverted-Classroom-Prinzip.
Indexsatz, Chern-Klassen, Pontrjagin-Klassen (3.4 - 4.3.7 im Skript)

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24.04.2024, 14:00 - 15:00  –  Campus Golm, Building 5, Room 2.05.0.01
Informationsveranstaltung

Zentrale Arbeitsschutzunterweisung

Frau Zilm (Bereich Sicherheitswesen)

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24.04.2024, 15:00 - 17:30  –  2.9.1.22
SFB-Seminar

A time-adaptive optimal control approach for 4D-var data assimilation problems governed by parabolic PDEs

Jannis Marquardt, TU Braunschweig

Seminar talk followed by a young researcher network meeting.

Abstract:

The common solution techniques of the data assimilation problem typically require the numerical treatment of large systems.... 

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24.04.2024, 14:00 Uhr  –  2.05.0.01
Institutsveranstaltung

Arbeitsschuzunterweisung

Stefanie Zilm

Für alle Mitarbeiterinnen und Mitarbeiter des Instituts für Mathematik ist jährlich eine Arbeistsschutzunterweisung verpflichtend. Bitte sprechen Sie es mit Ihren Vorgesetzten ab, dass Sie diesen... 

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22.04.2024, 10:30  –  Room 2.09.2.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Computational optimization of ideal weaves

Juliane Harnisch

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19.04.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

Free generators and Hoffman's isomorphism for the two-parameter shuffle algebra

Leonard Schmitz (MPI Leipzig)

Signature transforms have recently been extended to data indexed by two and more parameters. With free Lyndon generators, ideas from B∞-algebras and a novel two-parameter Hoffman exponential, we... 

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19.04.2024, 10:30  –  Zoom
Forschungsseminar Statistik

Optimal Stratification Learning: Clustering-by-dimensionality with reconstruction

Clément Berenfeld (UP)

Given i.i.d. random variables drawn from a mixture of immersed low-dimensional submanifolds of different dimensions, we study the minimax estimation of the family of submanifolds in Hausdorff... 

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18.04.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Spinstrukturen und Dirac-Operator

Christian Bär (UP)

Vorbereitung auf das Blockseminar "Geometrie" nach dem Inverted-Classroom-Prinzip.

2.4-2.5.11, 2.5.17-18, Thm 5.1.1 im Skript

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17.04.2024, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Zero measure Cantor spectrum for Sturmian metric graphs

Gilad Sofer (Technion)

Abstract: A classical result by Belissard et al states that the spectrum of a 1-dimensional Hamiltonian with a Sturmian potential is a singular continuous Cantor set of Lebesgue measure zero. More... 

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17.04. bis 17.04.2024, 10:15  –  room 2.22, house 9
Forschungsseminar: Gruppen und Operatoralgebren

Duality principles for frames and Riesz sequences via Morita equivalence

Ulrik Enstad

Frames provide a robust notion of infinite spanning sequences in a Hilbert space. Dually, a Riesz sequence is a strong type of linearly independent sequence. The frame property of certain structured... 

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12.04.2024, 10:15 - 11:30  –  2.28.0.108
SFB-Kolloquium

SFB Colloquium with Ulrike Herzschuh & Thomas Laepple

Ulrike Herzschuh & Thomas Laepple, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research

tba

 

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12.04.2024, 9:30 Uhr (Note the unusual time!)  –  Campus Golm, Building 9, Room 2.22
Arbeitsgruppenseminar Analysis

On manifolds of Lie group valued continuous BV-functions

Alexander Schmeding (NTNU, Trondheim)

Functions of bounded variation (BV) with values in a Banach space are a classical topic of analysis with specific applications for example in rough path theory. In the theory of rough paths one... 

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11.04.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Algebraische Grundlagen der Spingeometrie

Christian Bär (UP)

Vorbereitung auf das Blockseminar "Geometrie" nach dem Inverted-Classroom-Prinzip.
Clifford-Algebren, Spingruppe, Spinoren (2.1-2.3 im Skript)

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10.04.2024, 14:00 - 16:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

A glimpse into the world of quantum computing and programming

Bettina Just (Gießen), Dominique Unruh (Aachen)

14:00  Bettina Just (Gießen):  Some Basics of Quantum computing.
14:45
  Tea and Coffee Break
Zoom 15:15  Dominique Unruh (Aachen):  Quantum Hoare Logic ... and Ghosts.

 

Bettina Just (Gießen):  Some... 

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10.04.2024, 10:15 - 11:15  –  Haus 9, Raum 2.22
Forschungsseminar: Gruppen und Operatoralgebren

Relatively free trioids

Anatolii Zhuchok (Luhansk Taras Shevchenko National University, Poltava, Ukraine)

A trioid is an algebraic system consisting of a set with three binary associative operations satisfying certain axioms. Trioids are a generalization of semigroups. They play a prominent role in... 

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10.04.2024, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Effects of time-reversal invariance violation in quantum graphs.

Pavel Exner (Prague)

Abstract: The topic of this talk are quantum graphs with the vertex coupling which does not preserve the time-reversal invariance. As a case study the simplest example with the asymmetry being maximal... 

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21.03. bis 22.03.2024  –  Haus 9, Neues Palais, Potsdam (room 1.14, room 1.15)
Workshop

Workshop of FOR 5381 (statistics and machine learning)

This workshop is organised in the setting of the FOR 5381 project on Mathematical Statistics in the Information age, and will be broadly on statistical efficiency and computational tractability.

Here... 

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21.03.2024, 16:15  –  Raum 1.22
Forschungsseminar Differentialgeometrie

Investigating Fredholm properties of Lorentzian Dirac operators with boundary conditions

Lennart Ronge (UP)

Given a Dirac operator on a Lorentzian manifold with timelike boundary, its Fredholm index (and whether it is Fredholm at all) heavily depends on the boundary conditions that one imposes on the... 

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28.02.2024, 16:00  –  Campus Golm, Building 28, Room 0.102
SIAM Student Chapter Seminar for Early Career Researchers

The Mysterious Motility of Microorganisms

Agniva Datta, Jan Albrecht

First Presentation

Speaker: Agniva Datta

Topic: The mysterious motion of swimming bacteria: a bridge connecting biology and non-equilibrium physics

Abstract: 

From the mesmerizing patterns formed by... 

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20.02. bis 21.02.2024  –  Haus 9, Neues Palais, Potsdam (room 2.03)
Workshop

3rd ASCAI Workshop (statistics and machine learning)

This workshop is organised in the setting of of the ASCAI project and is on batch and sequential unsupervised learning.

Here is the schedule of the workshop.

For more information on the ASCAI-Project... 

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16.02.2024, 09:00 - 10:00  –  2.9.1.22
SFB-Seminar

Exploiting Independence for Optimal Gaussian Importance Sampling

Stefan Heyder, TU Ilmenau

Importance sampling is a Monte Carlo technique that estimates posterior expectations in Bayesian computation by sampling from a tractable proposal distribution instead of the intractable posterior.... 

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14.02.2024, 12:00 – 14:00 Uhr  –  Campus Golm, Haus 25, Raum F1.01
Öffentlicher Vortrag

Lunch Talks: "Women in Science - Hinter den Kulissen"

(English? click here) (Flyer der Veranstaltung)

Hinter wissenschaftlichen Ergebnissen stehen oft mehr Beteiligte als die, deren Namen sichtbar sind. Damit Forschung gelingt, muss das Umfeld stimmen,... 

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14.02.2024, 12 – 2 pm  –  Campus Golm, Haus 25, Room F1.01
Öffentlicher Vortrag

Lunch Talks: "Women in Science - Behind the Scenes"

(Deutsch? Hier klicken) (Event Flyer)

Scientific results are often the result of a team work which involves more people than those whose names are visible. A favourable environment contributes to... 

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12.02. bis 16.02.2024  –  University of Potsdam, Campus Golm
Konferenz

Microlocal and Global Analysis, Interactions with Geometry

The meeting is part of a series of meetings initiated by Professor Schulze devoted to micro-local, singular and global analysis and their interactions with geometry and mathematical physics.

Conferenc... 

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09.02.2024, 11:00  –  Campus Golm, Room 2.22, Building 9 (and Zoom)
Forschungsseminar Analysis

The Semiclassical Einstein Equations and the Stability of Linearized Solutions

Paolo Meda (U. Pavia) - Online

The semiclassical formulation of gravity is discussed in the framework of algebraic quantum field theory in curved spacetimes. The main topic of the talk is the Semiclassical Einstein Equations, which... 

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08.02.2024, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Eta invariants of the Berger spheres

Rebecca Roero

Presentation of an innovative way to compute the eta invariants for the Dirac operator of the Berger spheres. We can use the Atyiah-Patodi-Singer theorem for the index of the classical Dirac operator... 

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08.02.2024, 10:15 - 11:15  –  2.05.5.05 (changed!)
Forschungsseminar: Gruppen und Operatoralgebren

Cartan Semigroups

Tristan Bice (Czech Academy of Sciences)

Cartan subalgebras allow C*-algebras to be represented on effective twisted étale groupoids by utilising key properties of their normaliser semigroup.  Isolating these key properties, we formulate an... 

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07.02.2024, 10:15  –  2.09.0.12
Forschungsseminar: Gruppen und Operatoralgebren

Semiprime ideals in C*-algebras

Hannes Thiel (Chalmers)

Nonclosed ideals of bounded operators play a prominent role in the theory of singular traces as developed by Dixmier, Connes and many others, and the Calkin correspondence is a powerful tool that can... 

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02.02.2024, 10:15 - 11:15  –  room 0.108, building 28
SFB-Kolloquium

From Neurons to Symbolic Representation and Rapid Learning in Mind and Brain: A Brain-Constrained Neural Model

Rosario Tomasello, FU Berlin

To grasp the meaning of words and their relationship to the outside world, higher cognitive processes unique to the human brain are at work. However, despite decades of research on the neural... 

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02.02.2024, 11:00  –  Campus Golm, Building 9, Room 2.22 and Zoom
Forschungsseminar Analysis

Constraint Geometry and Reduction of Dirac Geometry

David Kern (U. Göttingen)

In this talk we first motivate constraint geometry by recalling Poisson geometry. Afterwards we introduce constraint manifolds as well as constraint vector bundles and prove a constraint Cartan... 

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31.01.2024, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Deducing properties of graphs from their C*-algebras (and vice versa)

Jonathan Taylor (UP)

Abstract: Given a directed row-finite graph, one may define representations of such a graph in C*-algebras and deduce the existence of a unique C*-algebra that is universal for such representations.... 

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30.01.2024, 12:15 - 13:30  –  2.9.2.22
SFB-Seminar

Computing Spectra of Infinite-dimensional operators - what do we need?

Catherine Drysdal, University of Birmingham

In this talk, I look at two examples regarding the numerical computation of spectra for infinite-dimensional non-self-adjoint operators. Two conditions are need to compute the spectrum of operators in... 

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26.01.2024, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

The free tracial pre-Lie-Rinehart algebra

Dominique Manchon (Clermont-Ferrand) - Online

Tracial Lie-Rinehart algebras are a purely algebraic version of finite-dimensional Lie algebroids, for which the trace is given fibrewise. A tracial Lie-Rinehart algebra is pre-Lie if moreover both... 

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24.01.2024, 14:00 - 16:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Analytic methods in Geometry: Quantum limits and H-infinity functional analysis.

Véronique Fischer (Bath), Lashi Bandara (Deakin Uni, Melbourne)

14:00 Véronique Fischer (Bath): Sub-Riemannian quantum limits.
14:45
Tea and Coffee Break
15:15 Lashi Bandara (Deakin Uni, Melbourne): Functional calculus, garnished with a little geometry.

Abstracts:
... 

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22.01.2024, 14:15 - 17:15  –  Campus Golm, Haus 9, Raum 2.22
Minikurs

Locally perturbed random walks II

Andrey Pilipenko (Nat. Acad. of Sciences & Nat. TU of Ukraine, Kyiv)

This will be the second and last part of a mini-course on locally perturbed random walks and their limits after normalisation.

Prerequisite: a first course of Probability theory (+ measure theory).

Ev... 

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22.01.2024, 15:30  –  Online
Arbeitsgruppenseminar Analysis

Meromorphic functions and projective embeddings of abelian varieties

Kamal Khuri Makdisi (AUB, Beirut)

Colloquium "Mathematics in Lebanon and beyond"

A \(g\)-dimensional abelian variety over the complex numbers is a special kind of complex torus \(C^g/L\), where \(L\) is a lattice of rank \(2g\). The... 

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18.01.2024, 16:00  –  Raum 14, Haus 9
Forschungsseminar Differentialgeometrie

Positive mass theorems and distance estimates for spin initial data sets

Rudolf Zeidler (Münster)

We will present variants of the spacetime positive mass theorem in the spin setting: Firstly, its conclusion \(E \geq|P|\) holds for a single asymptotically flat (AF) end in a spin initial data set... 

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17.01.2024, 15:30  –  Campus Golm, Building 9, Room 2.22
Institutskolloquium

Metric inequalities under lower scalar curvature bounds

Rudolf Zeidler (University of Münster)

We will discuss situations where a lower bound on the scalar curvature of a Riemannian manifold leads to a quantitative distance estimate as well as corresponding rigidity results. The study of these... 

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15.01.2024, 14:15 - 17:15  –  Campus Golm, Haus 9, Raum 2.22
Minikurs

Locally perturbed random walks I

Andrey Pilipenko (Nat. Acad. of Sciences & Nat. TU of Ukraine, Kyiv)

This will be the first part of a mini-course on locally perturbed random walks and their limits after normalisation.

Prerequisite: a first course of Probability theory (+ measure theory).

For more... 

mehr erfahren

12.01.2024, 10:15 - 11:15  –  2.28.0.108
SFB-Kolloquium

Statistical analysis of SPDEs – exploring singularities

Igor Cialenco, Illinois Institute of Technology

Unlike traditional finite-dimensional stochastic differential equations, statistical models driven by SPDEs are predominantly singular, when the solution is observed on a finite time interval. Hence,... 

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12.01.2024, 11:00  –  Campus Golm, Potsdam, building 09, room 2.22
Forschungsseminar Analysis

Singular SPDEs on Geometric Spaces

Harprit Singh (Edinburgh)

Abstract:
We shall discuss the solution theory to a large class of singular SPDEs in various non-translation invariant settings. In particular, I shall present results on Riemannian manifolds and... 

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11.01.2024, 11:00  –  Only ONLINE
Forschungsseminar Wahrscheinlichkeitstheorie

On the generalized Skorokhod reflection problem

Andrey Pilipenko (Nat. Acad. of Sciences & Nat. TU of Ukraine, Kyiv)

The Skorokhod reflection was used in 1961 to create a reflected Brownian motion on the half-line. Later, it was used for processes with jumps such as reflected Lévy processes. Like a Brownian motion,... 

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11.01.2024, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Hodge theorem for rough metrics

Lashi Bandara

In this talk, I will discuss the Hodge theorem in the context of rough metrics (locally bounded measurable coefficient metrics). This is work in progress with Georges Habib (Beirut).

mehr erfahren

15.12.2023, 10:15 - 11:15  –  2.28.0.108
SFB-Kolloquium

Uncertainty Quantification and Attribution in Models of the Earth System

Thorsten Wagner, University of Potsdam

The recent State of Global Water Resources report by the World Meteorological Organization concluded that the hydrological cycle is spinning out of balance due to climate change and human activities.... 

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15.12.2023, 11:00  –  Campus Golm, Building 9, Room 2.22
Forschungsseminar Analysis

The stochastic Ebin-Marsden toolbox

Alexander Schmeding (NTNU, Trondheim)

Abstract:

Due to an idea by V. Arnold, certain partial differential equations (PDE) can be rewritten as ordinary differential equations (ODE) on infinite-dimensional manifolds.
One of the most... 

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14.12.2023
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

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14.12.2023, 16:00  –  Room 0.14, House 9
Forschungsseminar Differentialgeometrie

Rigidity for initial data sets and spacetimes

Jonathan Glöckle (Regensburg)

Initial data sets are pairs of a Riemannian metric and a symmetric 2-tensor on a manifold \(M\). They arise in General Relativity as induced Riemannian metric and induced second fundamental form,... 

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13.12.2023, 14:00  –  Campus Golm, Building 9, Room 2.22
Institutskolloquium

Exploring the International Mathematical Union

Norbert Schappacher (Strasbourg), Marie-Françoise Roy (Rennes)

2-2:45pm: Framing Global Mathematics.
The International Mathematical Union between Theorems and Politics
Norbert Schappacher (Strasbourg)

Abstract:
I will present examples that show how national and... 

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12.12.2023, 16:00  –  Zoom talk
Forschungsseminar Wahrscheinlichkeitstheorie

On the tradeoff between almost sure convergence and overshoot integrability with applications

Michael Högele (Univ. de los Andes, Kolumbien)

In this talk we present a quantitative version of the Borel-Cantelli lemma, which allows for a quantification of the "tradeoff" between a.s. rates of convergence and the precise integrability of the... 

mehr erfahren

08.12.2023, 11:00  –  Campus Golm, Building 9, Room 2.22, (and per Zoom)
Forschungsseminar Analysis

A Poincaré formula for differential forms and applications

Georges Habib (Lebanese University, Beirut)

Abstract:

We  prove a new general Poincaré type inequality for differential forms on compact Riemannian manifolds with nonempty boundary.
When the boundary is isometrically immersed in Euclidean... 

mehr erfahren

07.12.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Markov chains arising from graphs over ordered fields

Anna Muranova (University of Warmia and Mazury in Olsztyn)

Abstract: In this talk we consider graphs, whose weights belong to an ordered field. It is known, that in the case of real weights every weighted graph defines a Markov chain, whose states are... 

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07.12.2023, 10:30  –  Weierstrass Inst., Berlin
Forschungsseminar Wahrscheinlichkeitstheorie

Invariant integrated convexity profiles for Hamilton-Jacobi-Bellman equations and applications.

Giovanni Conforti (Ecole Polytechnique, Paris)

It has been known for a long time that Hamilton-Jacobi-Bellman (HJB) equations preserve convexity, namely if the terminal condition is convex, the solution stays convex at all times. Equivalently,... 

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06.12. bis 06.12.2023, 10:15  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Random Walks On Finite Group: Cutoff For Card Shuffles

Mohamed Belkasim

mehr erfahren

06.12.2023, 11:00  –  Campus Golm, Haus 9, Raum 0.17
Verteidigung der Masterarbeit / Defence of the Master's thesis

Evolutionary Graph Theory

Mert Ugurlu

Evolutionary Graph Theory extends the Moran-Process of Population Genetics to a random process where the population has some structure. A typical question is for fixation when a new mutant allele... 

mehr erfahren

06.12.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

An embedded trace theorem for infinite metric trees with applications to transmission problems with mixed dimensions.

Konstantin Pankrashkin (Carl von Ossietzky Universität Oldenburg)

Abstract: For a class of weighted infinite metric trees we propose a definition of the boundary trace which maps H^1-functions on the tree to L^2-functions on a compact Riemannian manifold. For a... 

mehr erfahren

01.12.2023, 11:00  –  Campus Golm, Building 9, Room 2.22
Forschungsseminar Analysis

Post-Lie algebra of derivations and regularity structures

Jean-David Jacques (Potsdam)

Abstract:

Post-Lie algebra structures are a generalization of Pre-Lie algebras. They have their roots in geometry and correspond to the algebraic properties satisfied by the covariant derivative in... 

mehr erfahren

30.11.2023, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Variation of the analytic torsion of the perturbed Laplace operator on a manifold with boundary.

Ihsane Malass

Ray and Singer proved that on a closed manifold the analytic torsion is independent of the choice of Riemannian metric and on a compact manifold with boundary under relative / absolute boundary... 

mehr erfahren

24.11.2023, 10:15 - 11:15  –  room 0.108, building 28
SFB-Kolloquium

Discretization-adaptive regularization of inverse problems

Tim Jahn

We consider linear inverse problems under white (non-Gaussian) noise. For the solution we have to discretize the problem, and we consider a sequence of discretization schemes with increasing... 

mehr erfahren

24.11.2023, 11 Uhr  –  Campus Golm, Building 9, Room 2.22
Forschungsseminar Analysis

Higher currents for the sine-Gordon model in perturbative Algebraic Quantum Field Theory

Fabrizio Zanello (Univ. Potsdam)

Title:

Higher currents for the sine-Gordon model in perturbative Algebraic Quantum Field Theory


Abstract:

First, we review the 2-dimensional sine-Gordon model in Classical Field Theory and derive... 

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24.11.2023, 10:00  –  Campus Golm, Haus 9, raum 1.22
Arbeitsgruppenseminar Angwandte Geometrie und Topologie

Seminar: A galaxy of periodic tilings

Prof. Dr. Daniel Huson (University of Tübingen)

Abstract: This talk has four parts. In the first part - topology -, we recall the classification of two dimensions manifolds and orbifolds, and introduce their Conway notation. In the second part -... 

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23.11.2023, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Parameter optimization in modeling static deformations of elastic membranes with TensorFlow 2.0

Claudia Grabs

The solution of a boundary value problem for static deformations of hyperelastic membranes depends on some constant material parameters describing the elastic properties of the material. These can be... 

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22.11.2023, 14:00 - 16:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Information geometry

Lorenz Schwachhöfer (TU Dortmund), Nihat Ay (TU Hamburg)

14:00 Lorenz Schwachhöfer (TU Dortmund)

14:45 Tea and Coffee Break

15:15 Nihat Ay (TU Hamburg)

Lorenz Schwachhöfer (TU Dortmund): Information Geometry in the classical and quantum setting

Abstract:In... 

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20.11.2023, 15:30  –  online
Colloquium

Deriving quantitative estimates on random matrices using free probability tools

Marwa Banna (New York University Abu Dhabi)

Abstract: In this talk, I start with a brief introduction to random matrices and free probability theory and highlight the connection between the two domains. I will then show how free probability... 

mehr erfahren

17.11.2023, 11 Uhr  –  Room 2.22 of the mathematics building (Haus 9)
Forschungsseminar Analysis

Boundary value problems for loaded partial differential equations with the classical and nonclassical operators

Umida Baltaeva (Uzbekistan Academy of Sciences)

Title: Boundary value problems for loaded partial differential equations with the classical and nonclassical operators

Abstract: I will introduce loaded equations and their applications to applied... 

mehr erfahren

16.11.2023, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Microlocalisation on a manifold with boundary-II

Onirban Islam

Loosely speaking, if two (pseudo)differential operators differ only by smoothing operators then they are called microlocal conjugate to each other. It is a classic result by Duistermaat and Hörmander... 

mehr erfahren

16.11.2023, 10:15 - 11:45  –  room 2.22, building 9
SFB-Seminar

Nonparametric classification with missing data

Torben Sell, University of Edinburgh

Missing data are ubiquitous in modern statistics, posing a major challenge in a plethora of applications. In the first half of the talk, I will firstly introduce the general missing data problem and... 

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16.11. bis 16.11.2023, 10:15 - 11:45  –  Online
Forschungsseminar: Gruppen und Operatoralgebren

Long thin covers and finite nuclear dimension for crossed product C*-algebras

Jianchao Wu (Fudan University)

Finite nuclear dimension is a regularity property of C*-algebras that have played a pivotal role in the Elliott classification program of C*-algebras. It has been a key problem in the field to verify... 

mehr erfahren

15.11.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Isospectral magnetic graphs via partitions of numbers

Prof. Olaf Post (Trier)

Abstract: In this talk I will present a construction of discrete magnetic non-isomorphic graphs with isospectral Laplacians.  The construction is based on gluing building blocks according to a... 

mehr erfahren

09.11.2023, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

An introduction to microlocalisation on a manifold with boundary

Onirban Islam (UP)

Loosely speaking, if two (pseudo)differential operators differ only by smoothing operators then they are called microlocal conjugate to each other. It is a classic result by Duistermaat and Hörmander... 

mehr erfahren

08.11.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Sampling nodes on graphs using Determinantal Point Processes

Simon Barthelmé

Abstract: Joint work with Nicolas Tremblay, Pierre-Olivier Amblard

Determinantal Point Processes (DPPs) are an important class of models of random sets that arise in many areas of mathematics and... 

mehr erfahren

07.11.2023, 16:15 - 17:15  –  room 0.13, building 9
SFB-Seminar

Kernel matrices in the flat limit

Simon Barthelmé, CNRS, Gipsa-lab

Kernel matrices are ubiquitous in statistics, numerical analysis, and machine learning, appearing in methods for interpolation, regression, inverse problems, etc. One perennial difficulty in kernel... 

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03.11.2023, 10:00  –  Room 2.22, Building 9
Forschungsseminar Analysis

Shuffle of trees : the state of the art, Cumulants of bimonoids of species and characteristic operations

Pierre Clavier (Mulhouse), Yannic Vargas (Graz)

Pierre Clavier (Mulhouse):

This talk will be introductory and non-technical, with the aim to introduce the participants to
current research questions about shuffle of rooted forests. I will start by... 

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02.11.2023, 10:15  –  Campus Golm, Haus 14, Room 0.21
Forschungsseminar: Gruppen und Operatoralgebren

Ratio-limits and Toeplitz quotients for random walks on relatively hyperbolic groups

Adam Dor-On (Haifa University)

When studying quotients of C*-algebras generated by creation and annihilation operators on analogues of Fock space, the existence of a unique smallest equivariant quotient becomes an important... 

mehr erfahren

02.11.2023, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

The Price is right? Statistical and Microscopic Properties of Cryptocurrency Trading

Christoph Stephan

The talk commences with an exploration of the fundamental mechanisms of modern electronic exchanges and their statistical properties, setting the groundwork for understanding price formation in crypto... 

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01.11.2023, 11:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Jacaranda and the substreetutions

Renaud Leplaideur (Université de la Nouvelle-Calédonie)

Abstract: I will present a new object, called substreetution, which is an extension of substitutions in dynamics (Z-action) to colored trees (free-group action). The main part of the talk will be... 

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27.10.2023, 10:15 - 11:15  –  2.28.0.108
SFB-Kolloquium

On polynomial-time mixing for high-dimensional MCMC in inverse problems

Sven Wang (HU Berlin)

We consider the problem of generating random samples from high-dimensional posterior distributions. We will discuss both (i) conditions under which diffusion-based MCMC algorithms mix... 

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27.10.2023, 11:00  –  Raum 2.22, Haus 9, Golm
Arbeitsgruppenseminar Analysis

Rough paths based on multi-indices and their algebraic renormalization

Pablo Linares (Imperial College, London)

Abstract:

Following the approach of Otto et. al., we derive a notion of rough path based on multi-indices suitable for real-valued rough differential equations, and build its associated algebraic... 

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26.10.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

The holographic index theorem

Christian Bär (UP)

The holographic index theorem relates the index of a Dirac-type operator on a compact manifold with boundary subject to certain local boundary conditions to the index of an induced operator on the... 

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25.10.2023, 12:00  –  Campus Golm, Building 9, Room 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Duality, interacting particle systems, and infinite-dimensional orthogonal polynomials

Sabine Jansen (LMU München)

Studying the time-evolution of a many-particle system is a difficult task. For some interacting particle systems in Z^d, duality and intertwining allow to map the time evolution of one- or two-point... 

mehr erfahren

25.10.2023, 14:00 - 15:30  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

80 Years of Mathematical Modelling of Geosphere, Biosphere, and Anthroposphere

Bernhelm Booß-Bavnbeck (Roskilde)

14:00 Bernhelm Booß-Bavnbeck (Roskilde)

14:45 Tea and Coffee Break

 

Bernhelm Booß-Bavnbeck (Roskilde): 1943-2023, Tribute and Review - 80 Years of Mathematical Modelling of Geosphere, Biosphere, and... 

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23.10.2023, 11:00 - 12:00  –  Raum 1.22, Haus 9, Golm
Forschungsseminar: Gruppen und Operatoralgebren

Totally disconnected locally compact groups, groupoids, and computability

André Nies (University of Auckland)

We introduce t.d.l.c. groups and then study their algorithmic aspects. A useful tool is the meet groupoid, which is the natural groupoid on compact open cosets, enriched by the intersection operation.... 

mehr erfahren

20.10.2023, 11:00 Uhr  –  Room 2.22 of Building 9 & zoom
Forschungsseminar Analysis

The frames of a vector bundle groupoid

Alfonso Garmendia (CRM, Barcelona)

Abstract: This talk will explore the structure of vector bundle grupoids, which are groupoids in the category of vector bundles. The most well-known example is the tangent bundle of a groupoid, which... 

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19.10.2023, 16:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Extracting Hadamard coefficients from Green’s expansions

Lennart Ronge (UP)

Hadamard coefficients are a Lorentzian equivalent to the Riemannian heat kernel coefficients. They encode information about the geometry of the underlying Lorentzian manifold (e.g. the scalar... 

mehr erfahren

19.10.2023, 10:15  –  Campus Golm, Haus 10, Raum 0.26
Forschungsseminar: Gruppen und Operatoralgebren

Essential Cartan pairs and their non-Hausdorff groupoid models

Jonathan Taylor (UP)

Renault's theorem for Cartan pairs of C*-algebras states that C*-algebras with particularly nice commutative subalgebras, called Cartan subalgebras, admit twisted groupoid models. One of the... 

mehr erfahren

18.10.2023, 12:00  –  Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Pseudo-chaotic expansion and explicit correlation formula for the Hawkes processes

Anthony Réveillac (INSA Toulouse)

Hawkes processes have proved to be a powerful probabilistic model for various applications in neurosciences or insurance. These counting processes are defined through their intensity which is... 

mehr erfahren

18.10.2023, 13:15  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Computing the spectrum of infinite-volume operators from finite patches

Paul Hege (Tübingen)

Abstract: The spectrum of infinite-volume operators is often computed numerically by considering finite sections with Dirichlet or periodic boundary conditions, but such artificial boundary conditions... 

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12.10.2023, 16:15  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Minimal geodescis

Bernd Ammann (Regensburg)

A geodesic \(c : \mathbf{R}\to M\) is called minimal if a lift to the universal covering globally minimizes distance. On the 2-dimensional torus with an arbitrary Riemannian metric there are... 

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20.09.2023, 10:15  –  Raum 2.22
Schülerförderung

Kann man die Form einer Trommel hören?

Christian Bär (UP)

mehr erfahren

11.09. bis 13.09.2023  –  Campus Griebnitzsee
SFB 1294 - Annual Meeting

Potsdam DA Days 2023

The Potsdam DA Days 2023 will take place from September 11th to 13th at the Campus Griebnitzsee at the University of Potsdam. The event will be combined with the SFB Annual Meeting and will we opened... 

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11.09.2023, 09:30 - 10:30  –  Campus Griebnitzsee, building 6, lecture hall H02
Kálmán Lecture

6th Kálmán Lecture with Richard Nickl

Richard Nickl

This 6th Kálmán Lecture with Richard Nickl is opener for the 2nd Potsdam DA Days. Title of his talk is

'On posterior consistency in non-linear Bayesian data assimilation problems'.

Abstract

Bayesian... 

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31.07. bis 04.08.2023  –  Neues Palais, Haus 9, Room 1.09.1.02
Konferenz

Spectral theory and geometry of ergodic Schrödinger operators

Speakers: David Damanik (Rice university, Houston), Anton Gorodetski (University of California, Irvine), Jake Fillman (Texas State University)

Organizers:  Ram Band, Siegfried Beckus, Matthias Keller

... 

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26.07.2023  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Some Results on Absolutely Continuous Spectrum for Laplacians on Radial Metric Tree Graphs

Dr. Christian Seifert (TUHH)

Abstract: Given a radial metric tree graph, we consider Laplacians with self-adjoint coupling conditions at the vertices. We consider the questions whether presence of absolutely continuous spectrum... 

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24.07.2023, 10:15  –  2.09.1.10
Forschungsseminar Statistik

Early stopping for conjugate gradients in statistical inverse problems

Laura Hucker (HU)

Abstract:    We consider estimators obtained by applying the conjugate gradient algorithm to the normal equation of a prototypical statistical inverse problem. For such iterative procedures, it is... 

mehr erfahren

21.07.2023, 9:00 - 10:30  –  Raum 2.22, Haus 9
Forschungsseminar: Gruppen und Operatoralgebren

The Rosenberg Conjecture through the lens of Solidification

Georg Lehner (FU Berlin)

The Rosenberg Conjecture through the lens of Solidification

The Rosenberg Conjecture states that for a given Banach Algebra A, the
comparison map between algebraic and topological K-theory becomes an
... 

mehr erfahren

21.07.2023, 10:30 Uhr  –  Room 2.22 of Building 9 & zoom
Forschungsseminar Analysis

A symplectic morning with Bernhelm Boos-Bavnbeck and Chaofeng Zhu

Bernhelm Booss-Bavnbeck (Roskilde,Danemark), Chaofeng Zhu (Nankai,China)

10:30 Uhr Bernhelm Booss-Bavnbeck (Roskilde,Danemark)

Title: The Calderón Projection for Elliptic Differential Operators on Manifolds with Boundary:
Concept, Meaning, and Deformation Properties

... 

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20.07. bis 21.07.2023  –  Campus Griebnitzsee
SFB-Seminar

Rising Stars in Data Assimilation

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tba

mehr erfahren

19.07.2023, 14:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Duality in random phenomena.

Adrian Gonzalez Casanova (UNAM, Mexico and UC Berkeley, USA), Maite Wilke Berenguer (HU Berlin)

14:00 Adrian Gonzalez Casanova (UNAM, Mexico and UC Berkeley, USA)

14:45 Tea and Coffee Break

15:15 Maite Wilke Berenguer (HU Berlin)

Adrian Gonzalez Casanova (UNAM, Mexico and UC Berkeley, USA):... 

mehr erfahren

17.07.2023, 10:15  –  2.09.1.10
Forschungsseminar Statistik

Introduction to Reinforcement Learning

Tomáš Kocák

Abstract:    
Reinforcement Learning (RL), like Multi-Armed Bandits, is a popular paradigm for sequential decision-making under uncertainty. A typical RL algorithm operates with only limited knowledge... 

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14.07.2023, 10:15 - 11:15  –  Campus Golm, building 28, lecture hall 0.108
SFB-Kolloquium

Model Order Reduction in Data Assimilation

Karen Veroy-Grepl

The use of model order reduction techniques in combination with data assimilation methods for estimating the state of systems has been of great interest in recent years. In this talk, we discuss some... 

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12.07.2023, 10:15 - 11:15  –  2.09.0.14
Forschungsseminar Numerik/Angewandte Mathematik/Statistik

Reduced Basis Methods: From Key Ingredients to 4DVar

Martin Grepl (RWTH Aachen)

The reduced basis method is a certified model order reduction technique for the rapid and reliable solution of parametrized partial differential equations (PDEs), and it is especially suited for the... 

mehr erfahren

12.07.2023, 14:45 - 17:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Arithmetic groups in action

Holger Kammeyer (Heinrich Heine University), Roman Sauer (Karlsruher Institut für Technologie)

14:45 Holger Kammeyer (Heinrich Heine University)

15:30 Tea and Coffee Break

16:00 Roman Sauer (Karlsruher Institut für Technologie)

Holger Kammeyer (Heinrich Heine University): Can one recover... 

mehr erfahren

12.07.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

The hidden structure in Apery's proof

Ofir David (Technion)

Abstract: In 1978, Apery proved the irrationality of the Riemann zeta value ζ(3) by utilizing a fast converging sequence of rational approximations. However, the details of his proof remained... 

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12.07.2023, 10:00  –  Campus Golm, Haus 9 Raum 0.17 (und online)
Forschungsseminar Wahrscheinlichkeitstheorie

On the space-time correlations in KPZ growth models

Patrik Ferrari (Univ. Bonn)

We will discuss results on the correlation structure of some models in the KPZ universality class, for instance, on the covariance of limiting the processes along characteristic lines and of the... 

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06.07. bis 06.07.2023, 13:00 - 14:00  –  2.22
Forschungsseminar: Gruppen und Operatoralgebren

Simplicity of crossed products by FC-hypercentral groups

Dan Ursu (University of Münster)

Results from a few years ago of Kennedy and Schafhauser characterize simplicity of reduced crossed products AxG, where A is a unital C*-algebra and G is a discrete group, under an assumption which... 

mehr erfahren

05.07.2023, 10:00  –  Campus Golm, Haus 9 Raum 0.17 (und online)
Forschungsseminar Wahrscheinlichkeitstheorie

Improved error bounds for score-based diffusion models

Giovanni Conforti (Ecole Polytechnique, Palaiseau)

The aim of this talk is to provide with an introduction to score-based diffusion models, that are a special class of generative models that has recently provided with impressive experimental results... 

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05.07.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Existence of minimizers for weighted Lp-Hardy inequalities

Ujjal Das (Technion)

The abstract can be found here.

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03.07.2023, 10:15  –  Golm, Haus 9, Raum 1.10
Forschungsseminar Statistik

Expert-ranking for bi-isotonic matrices under unknown permutations

Max Graf

Abstract:  

 As motivation, we consider a bunch of experts responding to a set of questions, where we can observe whether an expert answers a question correctly or not. Assume that for every pair of... 

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30.06.2023, 11 Uhr  –  Haus 9, Raum 2.23
Arbeitsgruppenseminar Analysis

A groupoidal approach to polyhomogeneous pseudodifferential operators in the Heisenberg setting.

Nathan Couchet (University of Clermont-Auvergne, France)

Abstract:

The aim of this talk is to present a groupoidal approach to pseudodifferential calculi and how it can be implemented to define pseudodifferential  operators on smooth manifolds,... 

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29.06.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

On the tameness of the Fréchet space of smooth functions on a compact manifold

Christian Bär (UP)

We give a simple proof of the tameness of the Fréchet space of smooth sections of a vector bundle over a compact manifold.

mehr erfahren

28.06.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

The Maslov index in spectral theory: an overview

Selim Sukhtaiev (Auburn University)

Abstract: This talk is centered around a symplectic approach to eigenvalue problems for systems of ordinary differential operators (e.g., Sturm-Liouville operators, canonical systems, and quantum... 

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28.06.2023, 10:00  –  House 9, Campus Golm, Room 0.17
Forschungsseminar Wahrscheinlichkeitstheorie

About some reinforcement stochastic processes

Pierre-Yves Louis (Univ. Bourgogne Franche-Comté)

We will present an overview of some new models and results about the long time behaviour of stochastic processes with reinforcement. Some applications will be outlined : urn models with different kind... 

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23.06.2023, 10:15 - 11:15  –  Campus Golm, building 28, lecture hall 0.108
SFB-Kolloquium

Research data in mathematics, FAIRness, and the MaRDI consortium

Tabea Krause & Tabea Bacher, MaRDI

In this talk we will introduce a definition of 'research data' in mathematics which encompasses all digital objects you handle in the process of doing research. We will discuss how these data can be... 

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22.06.2023, 14:15-15:45  –  Zoom
Geometric Analysis, Differential Geometry and Relativity

A Rigidity Theorem for Asymptotically Flat Static Manifolds and its Applications

Brian Harvie (National Taiwan University)

In general relativity, many physically and mathematically important questions concern the uniqueness of the Schwarzschild space. For example, the black hole uniqueness theorem states that the... 

mehr erfahren

22.06.2023, 14:00 - 17:00  –  Campus Golm, Building 9, Room 2.22
Institutsveranstaltung

Talks by Master's Students fom Potsdam and Rennes

We cordially invite you to our joint event between visitors from Rennes who participate in the EDUC program and our Master's students. There will be  short talks by students from Potsdam and Rennes on... 

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22.06.2023, 13:00 - 14:00  –  Haus 9, Raum 2.22
Forschungsseminar: Gruppen und Operatoralgebren

Linear independence of coherent systems associated to discrete subgroups

Ulrik Enstad (UP)

The HRT conjecture states that any finite set of time-frequency shifts of a nonzero, square-integrable function is linearly independent. While the conjecture is still open, it was settled by Linnell... 

mehr erfahren

21.06.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

A diophantine characterization of linear repetitivity in cut and project sets: quantitative results.

Johannes Happich (Leipzig)

Abstract: When comparing the complexity of different aperiodic quasicrystals, it appears that linear repetitivity is a useful property that only applies to the - in some sense - most regular... 

mehr erfahren

19.06.2023, 10:15  –  Zoom
Forschungsseminar Statistik

Active clustering with bandit feedback

Victor Thuot

Abstract:  
We investigate the problem of active clustering with bandit feedback, a pure exploration bandit problem.
Unlike the well-known and extensively studied problem of clustering, active... 

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16.06.2023, 13:15  –  Haus 9, Raum 2.22 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Duistermaat index and eigenvalue interlacing for self-adjoint extensions of a symmetric operator

Gregory Berkolaiko

Abstract:
Eigenvalue interlacing is a tremendously useful tool in linear algebra
and spectral analysis.  In its simplest form, the interlacing
inequality states that a rank-one positive perturbation... 

mehr erfahren

16.06.2023, 14:00  –  Raum 1.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Diskrete Untergruppen der Isometriegruppe der hyperbolischen Geometrie und ihre Visualisierung im Hyperboloidmodell auf dem Computer

Alexander Grabow

mehr erfahren

15.06.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Introduction to Fréchet Manifolds V

Rubens Longhi

Connections on Fréchet vector bundles and Fréchet Lie groups. [I.4.5-I.4.6]

mehr erfahren

15.06. bis 15.06.2023, 13:00 - 14:00  –  2.22
Forschungsseminar: Gruppen und Operatoralgebren

Entropy, orbit equivalence, and the Rokhlin lemma

David Kerr (University of Münster)

I will discuss some recents applications and developments surrounding the Ornstein-Weiss Rokhlin lemma involving quantitative versions of orbit equivalence and questions of tileability in topological... 

mehr erfahren

14.06.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Spectral minimal partitions of metric graphs: what and why?

James Kennedy

Abstract: SMPs offer a way of dividing a given object (domain, manifold or graph) into a given number of pieces in an ``analytically optimal'' way: typically, one attempts to minimise an energy... 

mehr erfahren

14.06.2023, 14:00  –  Golm campus, Building 9, Room 2.22
Institutskolloquium

On the design of scientific visualization

Nicolas Rougier (INRIA, Bordeaux)

14:00 Nicolas Rougier (INRIA, Bordeaux): On the design of scientific visualization

15:00 Tea and Coffee Break

Abstracts:

Nicolas Rougier (INRIA, Bordeaux): On the design of scientific visualization
Ab... 

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08.06.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

What is a jet bundle?

Christian Bär (UP)

I'll give a concise introduction to jet bundles of vector bundles. They allow to treat (higher) derivatives of sections in a coordinate invariant way without the need to introduce connections.... 

mehr erfahren

08.06. bis 08.06.2023, 13:00 - 14:00  –  2.22
Forschungsseminar: Gruppen und Operatoralgebren

The dichotomy amenable/paradoxical in inverse semigroups and their uniform Roe algebras

Fernando Lledo (University Carlos III de Madrid)

In the present talk I will briefly review certain aspects of the dichotomy amenable/paradoxical in the category of metric spaces and inverse semigroups. Then I will address the question of defining a... 

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07.06.2023, 10:00  –  Campus Golm, Haus 9, Raum 0.17 (und online)
Forschungsseminar Wahrscheinlichkeitstheorie

Sandpile models and spanning trees

Wioletta Ruszel (Univ. Utrecht)

The sandpile model (aka chip-firing game) is a toy model for studying self-organized criticality (SOC). SOC models are characterized by displaying power-law probability behaviour of certain quantities... 

mehr erfahren

07.06.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Gaussian upper heat kernel bounds and Sobolev inequalities on graphs with unbounded geometry

Dr. Christian Rose (Potsdam)

Abstract: On Riemannian manifolds the conjunction of Gaussian upper heat kernel bounds and the volume doubling property of balls are equivalent to Sobolev inequalities in arbitrarily small balls. The... 

mehr erfahren

06.06.2023, 15 Uhr  –  Zoom
Arbeitsgruppenseminar Analysis

Phenomena in High Dimensions

Pierre Youssef (New York University, Abu Dhabi)

Abstract:

What do high dimensional convex bodies look like? How does the spectrum of a random matrix behave as its dimension grows? How does the connectivity of a graph evolve as its size grows? In... 

mehr erfahren

05.06.2023, 10:15  –  Campus Golm, Haus 9, Raum 1.10
Forschungsseminar Statistik

Parameter Estimation from Noisy Observations of a Stochastic Heat Equation

Gregor Pasemann (HU)

We consider the problem of estimating the diffusivity of a stochastic heat equation (or more generally, the parametrized drift of an abstract linear stochastic parabolic evolution equation) from... 

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02.06.2023, 11 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Varieties of Discrete Signatures

Carlo Bellingeri (TU)

Abstract:

Following the work of Diehl, Ebrahimi-Fard and Tapia on discrete signatures of a time series, we will discuss the geometric properties of the discrete signature variety, i.e. the points... 

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01.06.2023, 15:30-16:30  –  Zoom
JoMaReC

A Green’s function proof of the positive mass theorem and related topics

Virginia Agostiniani

In this talk, we will explore the role of harmonic and p-harmonic functions in establishing fundamental geometric inequalities in mathematical relativity, such as the positive mass theorem and the... 

mehr erfahren

31.05.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Parabolic nonlocal equations with bounded measurable coefficients.

Marvin Weidner (Barcelona)

Abstract: The celebrated De Giorgi-Nash-Moser theory establishes Hölder regularity of solutions to second order equations in divergence form without any regularity assumptions on the coefficients.... 

mehr erfahren

31.05.2023, 10:00  –  Campus Golm, Haus 9, Raum 0.17 (and Online)
Forschungsseminar Wahrscheinlichkeitstheorie

Number-Rigidity and β-Circular Riesz gas

David Dereudre (Univ. Lille)

For an inverse temperature β>0, we define the β-circular Riesz gas on Rd as any microscopic thermodynamic limit of Gibbs particle systems on the torus interacting via the Riesz potential... 

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26.05.2023, 10:15 - 11:15  –  Campus Golm, building 28, lecture hall 0.108
SFB-Kolloquium

Conservative SPDEs as fluctuating mean field limits of stochastic gradient descent

Vitalii Konarovskyi, University of Bielefeld

My talk will be devoted to the convergence of stochastic interacting particle systems in the mean-field limit to solutions of conservative SPDEs. We will discuss the optimal convergence rate and... 

mehr erfahren

26.05.2023, 16:00  –  Online Talk
Arbeitsgruppenseminar Analysis

Linear Causal Disentanglement

Anna Seigal (Harvard University)

Abstract:

Causal disentanglement is the problem of finding a representation of data involving variables that relate causally to one another. In this talk, the focus will be on linear causal... 

mehr erfahren

25.05.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Introduction to Fréchet Manifolds IV

Florian Hanisch

Fréchet manifolds and vector bundles. [I.4.1-I.4.4]

mehr erfahren

24.05.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Spectral properties of quasiperiodic metric graphs

Gilad Sofer (Technion)

Abstract: Sturmian Hamiltonians appear in mathematical physics as popular models for one-dimensional quasicrystals. This family of discrete quasiperiodic Schrödinger operators, including the well... 

mehr erfahren

17.05.2023, 10:00  –  Campus Golm, Haus 9, Raum 0.17 & online
Forschungsseminar Wahrscheinlichkeitstheorie

Yaglom limits and convergence on local times for Bienaymé-Galton-Watson processes with immigration

Ben Povar (Univ. of Warwick)

We study the joint convergence of Bienaymé-Galton-Watson processes with immigration (BGWI) and its ``naive'' local times at 0 to the corresponding Continuous Branching Process with immigration (CBI)... 

mehr erfahren

17.05.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Ergodicity of Skew-Products over Markov Chains

Pablo Lummerzheim (Leipzig)

Title: Ergodicity of Skew-Products over  Markov Chains

Abstract: We extend a criterion of Alexander I. Bufetov for the ergodicity of skew-product extensions of Markov shifts with finite state space to... 

mehr erfahren

16.05.2023, 15:00  –  Zoom meeting
Arbeitsgruppenseminar Analysis

Symmetries in algebraic geometry and motives

Joseph Ayoub (University of Zurich)

Abstract:

Starting from the general notion of `symmetry' in mathematics, we give a gentle introduction to the theory of motives, which is the universal cohomology theory for algebraic varieties.

This... 

mehr erfahren

12.05.2023, 14:00 Uhr  –  Haus 9, Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Volumes and triangulations of flow polytopes of graphs

Alejandro Morales (University of Massachussetts Amherst)

Abstract:


A flow polytope of a directed acyclic graph is the set of flows on the edges of the graph with prescribed netflows on vertices. The conservation of flow is analogous to conservation of... 

mehr erfahren

11.05.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Introduction to Fréchet Manifolds III

Christian Bär

Higher derivatives in Fréchet spaces. [I.3.5-I.3.6]

mehr erfahren

11.05.2023, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

An energy minimizing flow for rotating stars in GR

Prof. Dr. Helmut Kaul (Universität Tübingen)

Within the framework of general relativity a star model is treated, consisting of a rotating liquid in the equilibrium of gravitational forces, pressure and centrifugal forces. I show the existence of... 

mehr erfahren

10.05.2023, 10:00  –  Campus Golm, Haus 9, Raum 0.17 & online
Forschungsseminar Wahrscheinlichkeitstheorie

Stochastic model of tumor evolution for cancer etiology and risk

Dr. Sophie Pénisson (Univ. Paris-Est Créteil)

We present a mathematical model of tumor evolution that includes all phases in the life of a tissue, from tissue development to cancer occurrence. The effects of a carrying capacity, different types... 

mehr erfahren

10.05.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Sharp Hardy-type inequalities for non-compact harmonic manifolds and Damek-Ricci spaces.

Florian Fischer (Potsdam)

Abstract: We show various sharp Hardy-type inequalities for the linear and quasi-linear Laplacian on non-compact harmonic manifolds with a particular focus on the case of Damek-Ricci spaces. Our... 

mehr erfahren

05.05.2023, 14:30  –  Auditorium Maximum im Haus 8, Am Neuen Palais
Ankündigung

Euler-Vorlesung 2023

Avi Wigderson und Catherine Goldstein

Die Euler-Vorlesung in 2023 wird vom Mathematiker Avi Wigderson aus Princeton gehalten. Den traditionellen historischen Vortrag wird die Mathematikerin Catherine Goldstein aus Paris geben.

Euler-Vorle... 

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05.05.2023, 13:00 (Note the unusual time!)
Forschungsseminar Analysis

Strichartz estimates for the Schrödinger equation on compact Lie groups

Duván Cardona (University of Gent, Belgium)

Some of us will follow the talk in the seminar room 2.22 of the maths building Golm Campus. Here is the link for the access  per Zoom:

   Login data for the Zoom Meeting
   https://us02web.zoom.us/j/... 

mehr erfahren

04.05.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Introduction to Fréchet Manifolds II

Christoph Stephan

Differentiation in Fréchet spaces [I.3.1-I.3.4]

mehr erfahren

03.05.2023, 10:00  –  Campus Golm, Haus 9, Raum 0.17
Forschungsseminar Wahrscheinlichkeitstheorie

High-dimensional grid exploration using self-avoiding exclusion processes

Dr. Jens Fischer (D-fine AG, Zürich; Univ. Toulouse)

With the advancements in quantum computing in recent years, the need for secure encoding methods, which can withstand quantum attacks, has motivated a new research branch in cryptography known as... 

mehr erfahren

28.04.2023, 11:00  –  Golm campus, Building 9, Room 2.22 + Zoom
Arbeitsgruppenseminar Analysis

A categorical approach to Statistical Mechanics

Grégoire Sergeant (INRIA and Sorbonne Université, Paris)

Statistical physics is a framework that focuses on the probabilistic description of complex systems: a collection of interacting 'particles' or components of a whole in most generality. In (rigorous)... 

mehr erfahren

28.04.2023, 13:30  –  Golm, Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

The Milnor-Moore and Poincaré-Birkhoff-Witt theorems in the locality set up, and the polar structure of Shintani zeta functions

Diego Andrés López Valencia

Ameldungen für ZOOM unter paycha@math.uni-potsdam.de

mehr erfahren

27.04.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Introduction to Fréchet Manifolds I

Christian Bär

In a series of lectures we introduce some basics for the block seminar on the Nash-Moser inverse function theorem. We start with the definition of and examples for Fréchet spaces and discuss Fréchet-s... 

mehr erfahren

26.04.2023, 10:00  –  Campus Golm, Haus 9, Raum 0.17 & Online
Forschungsseminar Wahrscheinlichkeitstheorie

Construction of a biological model and study of experimental design

Laetitia Colombani (Univ. Bern)

In this seminar, I will introduce a biological model we are constructing, and explain the questions that drives us. In link with this model, I will present the notion of experimental design, and how... 

mehr erfahren

26.04.2023, 4 pm  –  2.09.1.22
SIAM Chapter Seminar

An Introduction to Statistical Estimation Theory

Maximilian Graf

Abstract: The aim of this talk is the introduction of basic concepts of estimation theory illustrated by some simple examples. We focus on the notion of risk bounds and minimax risk. In this context,... 

mehr erfahren

21.04.2023, 10:15 - 11:15  –  Campus Golm, building 28, lecture hall 0.108
SFB-Kolloquium

Seasonal forecasting - opportunities and challenges

Antje Weisheimer, European Centre for Medium-Range Weather Forecasts

Seasonal forecasts aim to provide physically-based probabilistic outlooks of the climate conditions for the coming seasons. We create them by initialising coupled atmosphere-ocean-sea-ice models with... 

mehr erfahren

21.04.2023, 13:00  –  Room 2.09.2.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Non-Euclidean Estimates for Sturmian Hamiltonians

Yannik Thomas

Abstract: In this talk we study the spectral map of the Hamiltonians associated to quasi Sturmian dynamical systems. We describe a non-Euclidean metric on the parameter space which makes the spectral... 

mehr erfahren

20.04.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

The APS-Theorem for general geometric operators

Alberto Richtsfeld (UP)

The APS theorem is the extension of the Atiyah-Singer index theorem to manifolds with boundary. While the Atiyah-Singer index theorem holds for all elliptic differential operators, the APS theorem in... 

mehr erfahren

20.04.2023, 13:00 (unusal time and day!)  –  Online seminar
Arbeitsgruppenseminar Analysis

(Twisted) spectral triples and physics

Pierre Martinetti (University of Genoa)

We shall give an overview of the applications of spectral triples to high energy physics, in particular the Standard Model of fundamental interactions. Time permitting, we will present some recent... 

mehr erfahren

19.04.2023, 14:00  –  Golm campus, Building 9, Room 2.22 and online
Institutskolloquium

Mathematical aspects of tipping points in climate studies

Anna von der Heydt (Utrecht University) and Robbin Bastiaansen (Utrecht University)

14:00 Anna von der Heydt (Utrecht University): Dynamical systems approaches to climate response and climate tipping (via zoom)

14:45 Tea and Coffee Break

15:15 Robbin Bastiaansen (Utrecht University):... 

mehr erfahren

04.04.2023, 15:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Numerical semi-groups and applications

Abdallah ASSI (University of Angers)

A numerical semigroup  (NSG for short) is a monoid S of the set N of non negative integers such that the group generated by S in Z is Z (that is, S is stable under addition, 0 is an element of S, and... 

mehr erfahren

27.03. bis 29.03.2023, 8h30 - 18h30  –  Campus Griebnitzsee, Haus 6
Konferenz

Tagung „MATh.en.JEANS“

Eine Konferenz der besonderen Art: Schülerinnen und Schüler französischer Gymnasien aus ganz Europa präsentieren ihre jährlichen mathematischen Forschungsergebnisse, die in Arbeitsgruppen zusammen mit... 

mehr erfahren

20.03.2023, 14:00 Uhr  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Forschungsseminar Diskrete Spektraltheorie

MSc Verteidigung - Graphs with Nilpotent Group Actions and their Drifts

Matti Richter (Potsdam)

Abstract: We study positive generalized eigenfunctions of Schrödinger operators associated to graphs with cocompact group actions of nilpotent groups. For such a graph, we investigate the topological... 

mehr erfahren

07.03.2023, 16:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Interactions between ergodic theory and number theory: from beta-expansions to the Sierpinski gasket

Karma Dajani (Utrecht University)

In this talk we give an exposition on one of the interactions between ergodic theory and number theory. We will concentrate on the concept of β-expansions, which are representations of numbers of the... 

mehr erfahren

22.02.2023, 4 pm  –  2.09.2.22
SIAM Chapter Seminar

Framework Materials and Cylinder Packings

Matthias Himmelmann

Abstract: In a geometric context, framework materials are structures composed of many rigid bars (or edges), pinned together at vertices where the bars can freely rotate relative to each other. These... 

mehr erfahren

20.02. bis 24.02.2023  –  Campus Golm, Haus 10, Raum 0.25
Konferenz

Microlocal and Global Analysis, Interactions with Geometry 2023

diverse

We have the pleasure to invite you to the next edition of a series of meetings initiated by Professor Schulze devoted to microlocal, singular and global analysis and their interactions with geometry... 

mehr erfahren

17.02.2023, 11:00  –  Golm, Haus 9, 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Magnetic Laplacian on differential forms

Georges Habib (University of Lebanon, Beirut)

In this work, we introduce the magnetic Hodge Laplacian, which is a generalization of the magnetic Laplacian on functions to differential forms. We consider various spectral results, which are known... 

mehr erfahren

15.02.2023, 11:00  –  Golm, Haus 9, 2.22 + Zoom
Arbeitsgruppenseminar Analysis

The power series expansion of CR functions

Giuseppe Della Sala (American University of Beirut)

The field of Several Complex Variables studies the properties complex manifolds of dimension at least 2, and the corresponding holomorphic maps. In the subfield of CR Geometry, the main objects of... 

mehr erfahren

10.02.2023, 10:15 - 11:15  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Understanding and Applying Reinforcement Learning

Claire Vernade, DeepMind, London (UK)

Reinforcement Learning (RL) builds learning systems from the ground up by trial and error: as the agent takes actions, they receive rewards and observations that allow them to build a more... 

mehr erfahren

09.02.2023, 14:00-14:30  –  Haus 9, Raum 0.17
Verteidigung der Masterarbeit / Defence of the Master's thesis

Geometric Methods in Disordered Soft Packings

Herr Lukas Minogue

Betreuerin:  Prof. Myfanwy Evans

mehr erfahren

09.02.2023, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

On the approximation of null hypersurfaces via maximal surfaces

Albachiara Cogo

Maximal surfaces are spacelike hypersurfaces of a Lorentzian manifold which are critical points of the area functional. They are very important tools in General Relativity and can be studied by... 

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08.02.2023, 13:30 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Regularity results for locally integrable subharmonic functions on local Dirichlet spaces

Prof. Dr. Peter Stollmann (Chemnitz)

Abstract: We report on recent results from a joint work with B. Güneysu, S. Pigola and. G. Veronelli. Using a new notion of subharmonicity we can prove a version of the Braverman-Milatovic-Shubin... 

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08.02.2023, 12:00 – 14:00 Uhr  –  Campus Golm, Haus 12, Raum 0.01
Öffentlicher Vortrag

Lunch Talks zum UN Tag "Women in Science" - Begegnungen mit Wissenschaftlerinnen aus der ganzen Welt

(English? click here) (Flyer der Veranstaltung)

Anlässlich des internationalen Tages Women in Science – der die Leistungen und spezifischen Herausforderungen von Wissenschaftlerinnen sichtbarer machen... 

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08.02.2023, 12 – 2 pm  –  Campus Golm, Building 12, Room 0.01
Öffentlicher Vortrag

International Day "Women in Science" Lunch Talks – Encounters With Female Scientists From Around The Word

(Deutsch? Hier klicken) (Event Flyer)

On the occasion of the international day Women in Science – aiming to make the achievements and specific challenges of female scientists more visible – we invite... 

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07.02.2023, 15:00 - 17:00 CET  –  Online
Arbeitsgruppenseminar Analysis

Colloquium "Mathematics in Lebanon and beyond"

George Saliba (AUB) and Hussein Mourtada (IMJ, Université Paris-Cité)

Opening session of the colloquium  "Mathematics in Lebanon and beyond". The colloquium will serve as a meeting place for scientific exchange, bringing together mathematicians and physicists from the... 

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06.02.2023, 10:15  –  Golm Haus 9, 2.22 and Zoom
Forschungsseminar Statistik

A Short Introduction to Estimation of Permuted Bi-Isotonic Matrices

Max Graf

Abstract:
As motivation, we consider a bunch of experts responding to a set of questions, where we can observe whether an expert answers a question correctly or not. Assume that for every pair of... 

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06.02.2023, 13:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Local time approximation in parameter estimation for skew-sticky diffusions

Sara Mazzonetto (Univ. de Lorraine, Nancy)

In this seminar we first describe a class of real Markov processes with continuous sample paths which
shows singular behavior at a point, let us say barrier. The barrier is semi-permeable or sticky.... 

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03.02.2023, 13:30 (unusal time!)  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

The mathematics of causal set theory

Sumati Surya (Raman Research Institute, Bangalore, India)

Causal set theory is a discrete  approach to quantum gravity, where the Lorentzian spacetime continuum is replaced by locally finite partially ordered sets. The latter, which we call a "causal set" is... 

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02.02.2023, 16:00  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Fundamental solutions of partial derivatives on a half-space

Onirban Islam

The Dirac operator on a globally hyperbolic spacetime admits unique retarded and advanced fundamental solutions. They are well-known to be Lagrangian distributions. Recently, Bär and Gehring... 

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01.02.2023, 14:15 Uhr  –  Raum 2.09.2.22 und Zoom, Public Viewing im Raum 2.09.0.17
Institutsveranstaltung

Maria-Weber lecture

Dr. Siegfried Beckus (UP)

Title: Dry Ten Martini Problem for Sturmian Dynamical Systems

Abstract: Are all possible spectral gaps, predicted by the Gap labelling theorem, open for a given Schrödinger operator? This is the so... 

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30.01.2023, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Homogenisation of a multivariate diffusion with semipermeable reflecting interfaces

Olga Aryasova (Inst. of Geophysics, Nat. Acad. of Sciences of Ukraine / Friedrich–Schiller–Univ. Jena)

We study the homogenization problem for a multivariate stochastic differential equations with local times that determine semipermeable reflecting hyperplane interfaces. We show that this system has a... 

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27.01.2023, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Integrability, Painlevé Singularities and Fixed Points at Infinity

Jeremy Schiff (Bar-Ilan University, Israel)

I will review the notion of integrability for different kinds of (systems of) ordinary differential equations, and the relationship with the Painlevé property, that the only movable singularities of... 

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25.01.2023, 4:30 pm  –  House 9, Room 2.22
SIAM Chapter Seminar

Frequentist Ensemble Kalman Filtering

Maia Tienstra

Abstract:

In this talk I will briefly discuss statistical inverse problems, and how we can solve them using the Ensemble Kalman filter. I will then explain how in this setting, we implement early... 

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25.01.2023, 14 Uhr  –  Golm, Haus 9, Zimmer 2.22 + Zoom
Institutskolloquium

Differential equations and matrix equations in data science

Martin Stoll (Uni Chemnitz) und Melina Freitag (Uni Potsdam)

Zoom 14:00 Martin Stoll (Uni Chemnitz): From PDEs to data science: an adventure with the graph Laplacian

14:45 Tee und Kaffee Pause

15:15 Melina Freitag (Uni Potsdam): Large scale Lyapunov... 

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23.01.2023, 14:15-15:45  –  Zoom und 2.22
Geometric Analysis, Differential Geometry and Relativity

Ricci-Flow on surfaces along the standard light cone in the 3+1 Minkowski spacetime and applications

Markus Wolff

By identifying the conformal structure of the round $2$-sphere with the standard lightcone in the $3+1$ Minkowski spacetime we gain a new perspective on $2d$ Ricci flow on topological spheres in the... 

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23.01.2023, 13:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Early stages of the malaria parasite inside the mosquito

Dr. Angelo Valleriani (Max-Planck-Inst. of Colloids and Interfaces, Dept of Biomaterials, Potsdam)

The malaria parasite Plasmodium falciparum is ingested by the mosquito of the species Anophele, when
the mosquito gets a blood meal from an infected host. Inside the mosquito, the parasite's first 24... 

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20.01.2023, 12:00 (unusal time)  –  Zoom meeting
Arbeitsgruppenseminar Analysis

On Spectral Truncations of the d-Torus

Malte Leimbach (Radboud University, Nijmegen)

A couple of years ago, Connes and van Suijlekom introduced the notion of spectral truncation of a spectral triple as a means to trea noncommutative geometry at finite resolution. 
... 

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19.01.2023, 16:00 - 19:30  –  Audimax, Campus Neues Palais
Mathematik-Olympiade

Siegerehrung

Die Siegerehrung der Stadtolympiade Potsdam als zweite Stufe der Landesmathematikolympiade findet dieses Jahr wieder unter der Schirmherrschaft des Instituts für Mathematik der Universität Potsdam... 

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19.01.2023, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

Hawking mass monotonicity for initial data sets

Sven Hirsch

An interesting feature of General Relativity is the presence of singularities which can happen in even the simplest examples such as the Schwarzschild spacetime. However, in this case the singularity... 

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18.01.2023, 15:00  –  Raum 2.22 und Zoom
Verteidigung der Dissertation / Defence of the PhD thesis

Non-local boundary conditions for the spin Dirac operator on spacetimes with timelike boundary

Penelope Gehring

Non-local boundary conditions – for example the Atiyah–Patodi–Singer (APS) conditions – for Dirac operators on Riemannian manifolds are rather well-understood, while not much is known for such... 

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18.01.2023, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

A dynamical approach to density theorems for sampling in unimodular groups

Dr. Ulrik Enstad (Stockholm University)

Abstract: Many structured function systems in harmonic analysis arise from the action of a unitary group representation on a single vector in the underlying Hilbert space. A central question is... 

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17.01.2023, 11H00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Nonlinear pseudo-differential operators and stochastic equations on p-adic fields

Oleksandra Antoniouk (Institute of Mathematics NAS of Ukraine,  Kyiv Academic University)

The talk gives a brief overview of the results related to the theory of pseudo-differential equations in the spaces of test and generalized functions on the field of p-adic numbers. Results related to... 

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16.01.2023, 13:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Reflected diffusions in cones

Andrey Pilipenko (Inst. of Mathematics, Nat. Acad. of Sciences & Nat. TU of Ukraine, Kyiv)

Let X be a diffusion in a cone with oblique reflection at the boundary. We study the question whether X reaches a vertex of the cone in a finite time with positive probability. A new probabilistic... 

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13.01.2023, 11:00  –  Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Quantization and examples

Alfonso Garmendia (CRM, Barcelona)

Quantization tries to associate a classical system (a Poisson Manifold) to a quantum system (a C*-algebra) in a way that preserves the symmetries. This talk tries to convey the motivation and a... 

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13.01.2023, 10:15 - 11:15  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Deep Learning Statistical Tests for Genetic Studies of Image Phenotypes

Christoph Lippert (HPI)

In my talk I will give an overview on our ongoing work on the development of methods for finding associations between variation that is encoded in images and another variable such as genetics. To do... 

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12.01.2023, 16:00  –  Raum 1.10
Forschungsseminar Differentialgeometrie

The Rarita-Schwinger Operator on the Berger Sphere \(S^3\).

Peter Grabs

We look at \(S^3\) as a Lie Group and its representations, spin structure and Rarita-Schwinger operator. (In preparation to one day compute the Rarita-Schwinger spectrum using representation... 

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12.01.2023, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

Static vacuum metrics with prescribed Bartnik boundary data

Zhongshan An

The study of static vacuum Riemannian metrics arises naturally in differential geometry and general relativity. It plays an important role in scalar curvature deformation, as well as constructing... 

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11.01.2023, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Polya-Szego inequality on 2-D lattice graph.

Shubham Gupta

Abstract: In the continuum, symmetrization inequalities are a fundamental tool in various parts of analysis: variational problems, spectral geometry, mathematical physics just to name a few. In this... 

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09.01.2023, 10:15  –  Golm, Hs. 9, room 2.22 (and Zoom)
Forschungsseminar Statistik

Investigating Continuous Optimization for fast Change Point Detection: Results of a short Research Internship at Macquarie University, Sydney.

Hans Reimann

Abstract:

Change point detection may be considered an essential step in data exploration and diagnostics. Offline approaches reformulating the problem as a subset selection problem in linear... 

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04.01.2023, 13:30  –  Haus 9, Raum 0.17 und Zoom
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Uniqueness for elliptic equations on infinite graphs.

Fabio Punzo

Abstract: The talk is concerned with uniqueness, in weighted l^p spaces, of solutions to the Schrodinger equation, posed on an infinite graph. We shall distinguish the case p>=2 and 1<=p<2. 

Such... 

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15.12.2022, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

Decay of waves in gravitational solitons

Sharmila Gunasekarans

Gravitational solitons are globally stationary, horizonless asymptotically flat spacetimes with positive energy. I will address the stability of a particular family of solitons at the simplest level... 

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15.12.2022, 16:00  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Elastic shells

Claudia Grabs (UP)

Following chapter 10 in the book "Theoretical Elasticity" of A.E. Green and W. Zerna from 1968, we present basic equations for elastic shells. Since the three-dimensional equations for an elastic... 

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14.12.2022, 12:15  –  Golm, Haus 9, 1.10
SFB-Seminar

Bayesian and Deterministic Spatio-Temporal Methods with Edge-Preserving Priors for Inverse Problems

Mirjeta Pasha (Tufts University)

Abstract: Inverse problems are ubiquitous in many fields of science such as engineering, biology, medical imaging, atmospheric science, and geophysics. Three emerging challenges on obtaining relevant... 

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14.12.2022, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Arbeitsgruppenseminar Angwandte Geometrie und Topologie

Geometry and Topology in Biological Materials

Gerd Schröder-Turk, Murdoch University and Łucja Kowalewska University of Warsaw

14:00 Gerd Schröder-Turk: Nature's amazing mazes: bicontinuous surfaces in butterflies and their physical properties
15:00 Łucja Kowalewska: Structural dynamics of plant plastid membranes

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14.12.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

The space of Hardy-weights for quasilinear equations: Maz’ya-type characterization and sufficient conditions for existence of minimizers

Prof. Yehuda Pinchover (Technion)

Abstract: Let p ∈ (1,∞) and  Ω⊂ℝN be a domain. 

Let A:=(aij) ∈ Lloc(Ω ; ℝN× N) be  a symmetric and locally uniformly positive definite matrix. Set |ξ|A2:= ∑i,j=1N aij(x) ξi ξj,  ξ ∈ ℝN, and let V be... 

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12.12.2022, 10:15  –  Golm, Hs. 9, room 2.22 (and Zoom)
Forschungsseminar Statistik

Optimal reach estimation via metric learning

Clément Berenfeld

Abstract: In manifold learning, the reach is an ubiquitous regularity parameter that encompasses the well-behavior of the support of the underlying probability measure. Enforcing a reach constraint... 

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09.12.2022, 10:15 - 11:15  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

One-shot Learning of Surrogates in PDE-constrained Optimization Under Uncertainty

Claudia Schillings, Freie Universität Berlin

Approaches to decision making and learning mainly rely on optimization techniques to achieve “best” values for parameters and decision variables. In most practical settings, however, the optimization... 

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09.12.2022, 11:00  –  Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

CCR-representations of symplectic vector spaces

Nicolas Ginoux (Université de Lorraine, Metz)

We present the construction of the so-called CCR-representation of any given symplectic vector space. We shall follow Section 4.2 in the book "Wave equations on Lorentzian manifolds and quantization"... 

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08.12.2022, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

Global hyperbolicity through the eyes of the null distance

Leonardo Garcia Heveling

Can one encode the causal information of a spacetime in a metric space structure? In 2016, Sormani and Vega conjectured how this may be done. In this talk, I will present some recent results... 

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07.12.2022, 15:00 (unusual!)  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Institutskolloquium

Two combinatorial viewpoints on geometry

Christian Haase, FU Berlin and Federico Ardila, San Francisco State University

15:00 Christian Haase: Lattice Point Semigroups — Toric and Non-Toric

15:45 Tee und Kaffee Pause

16:15 Federico Ardila: Combinatorial Intersection Theory: Three Examples

Wenn Sie digital an den... 

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07.12.2022, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Random simplicial complexes of top bounded degree

Prof. Ron Rosenthal (Technion)

Abstract: In the talk we will introduce a model for random simplicial complexes which are high-dimensional counterparts of random regular graphs.

We will present some results for such random complexes... 

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02.12.2022, 11:00  –  Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

The Milnor Moore and Poincaré Birkhoff Witt theorems in the locality context

Diego López (Uni Potsdam)

In this talk, we will present a locality version of two celebrated structural theorems of Hopf algebras and universal enveloping algebras, namely the Milnor-Moore theorem and the... 

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01.12.2022, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

Ancient Solutions of Ricci flow with Type I curvature growth

Andoni Royo Abrego

Ancient solutions of geometric flows such as Ricci flow and Mean curvature flow arise naturally as models for singularity formation. There has been significant progress towards the classification of... 

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01.12.2022, 16:00  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Inversion of Radon transform and applications to microlocal regularity

Rubens Longhi (UP)

We aim at extending the classical notion of smooth wavefront set employing the Radon transform in order to capture different degrees of lack of \(\mathcal{F}\)-regularity of a... 

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30.11.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Computing nodal deficiency with a refined spectral flow

Bernard Helffer (Nantes Université)

in collaboration with

G. Berkolaiko, G. Cox, and  M. Persson Sundqvist 

Abstract
Recent work of the authors and their collaborators has uncovered fundamental connections between the... 

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28.11.2022, 13:00  –  Campus Golm, Haus 9 Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Relaxed formulation for the control of branching diffusions: Existence of an optimal control and HJB equation.

Antonio Ocello (Sorbonne-univ., Paris)

We study the existence of optimal control for branching diffusion processes. The considered problem use rewards that can be nonlinear in the final payoff and linear in the running payout. We give a... 

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28.11.2022, 14:00  –  Zoom
Forschungsseminar Statistik

Benign overfitting and adaptive nonparametric regression

Julien Chhor

Abstract:
Benign overfitting is a counter-intuitive phenomenon recently discovered in the deep-learning community. In specific cases, it has been experimentally observed that deep neural networks can... 

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25.11.2022, 11:00  –  Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Index Theory in sub-Riemannian Geometry via Stochastic Methods

Gianmarco Vega-Molino (Uni Bergen)

In the field of Riemannian geometry, the incredible Gauss-Bonnet theorem was the starting point for Index Theory, arguably one of the most important and successful endeavors in modern differential... 

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24.11.2022, 14:15-15:45  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

Some inequalities involving the ADM mass via linear and nonlinear potential theory

Francesca Oronzio

In this talk, we describe some monotonicity formulas holding along the level sets of suitable p–harmonic functions in asymptotically flat 3–manifolds with a single end, either with or without... 

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23.11.2022, 14:00  –  Golm, Haus 9, Zimmer 2.22
Institutskolloquium

Two perspectives on the geometry of Ricci-flat manifolds

Bernd Ammann, Uni Regensburg und Klaus Kröncke, KTH, Stockholm

14:00 Bernd Ammann (Uni Regensburg): From Pythagorean triples to constant mean curvature surfaces

14:45 Tee und Kaffee Pause

15:15 Klaus Kröncke (KTH, Stockholm): From the heat flow to the Ricci flow:... 

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21.11.2022, 10:15  –  Campus Golm, Building 9, Room 2.22 and Zoom
Forschungsseminar Statistik

Bandit-Algorithms for Data Sampling

Karen Seidel (UP)

Abstract:    In machine learning, algorithms generalize from available training data to unseen situations. The engineering practices used in the respective technologies are far from understood.... 

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21.11.2022, 14:00  –  Campus Golm, Haus 9, Raum 2.22 & Zoom
Forschungsseminar Wahrscheinlichkeitstheorie

1/3 scaling exponent and non-gaussian limit laws

Peter Nejjar (Bonn Uni./Potsdam Uni.)

The standard CLT is characterized by a fluctuation exponent of one half and a gaussian limit distribution. We will discuss several examples, e.g. of random growth models and interacting paticle... 

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18.11.2022, 11:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Traces on pseudodifferential operators on the noncommutative torus

Carolina Neira (Universidad Nacional, Bogotá)

On closed manifolds, there are functional traces on pseudodifferential operators, some of which appear in  noncommutative geometry.
The noncommutative residue, the Kontsevich and Vishik canonical... 

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17.11.2022, 14:15-15:45  –  2.22 and Zoom
Geometric Analysis, Differential Geometry and Relativity

Uniqueness of (n+1)-dimensional black holes and equipotential photon surfaces in static vacuum

Albachiara Cogo (U Tübingen)

In this joint work with Cederbaum, Leandro and Dos Santos, we generalize to any dimension n+1 Robinson’s divergence formula used to prove the uniqueness of (3 + 1)-dimensional static black holes. To... 

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16.11.2022, 13 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Spectrum of discrete Laplacian over an ordered field

Anna Muranova (University of Warmia)

Abstract:
We consider discrete normalized Laplacian for finite graphs, whose edge-weights belong to an arbitrary real-closed ordered field. We show that eigenvalues of Laplacian always belong to the... 

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14.11.2022, 13:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Penrose-stable Interactions in Classical Statistical Mechanics

Suren Poghosyan (Nat. Acad. of Science, Armenia)

For a pair potential Φ in a general underlying space X satisfying some natural and sufficiently general
conditions we define by means of the so called Ursell kernel a function r which is shown to be... 

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11.11.2022, 10:15 - 11:15  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Challenges of data driven modelling in cardiac dynamics

Ulrich Parlitz, Universität Göttingen

The myocardium is an electrically excitable medium that supports various types of excitation waves, including stable or chaotic spiral waves that cause life-threatening arrhythmias such as ventricular... 

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11.11.2022, 11:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Multiple sums and integrals associated with planar Schröder trees and set compositions

Yannic Vargas (Universität Graz)

We investigate and compare two different ways of associating multiple sums and multiple integrals to a certain class of planar rooted trees (Schröder trees). These give rise to characters on the... 

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10.11.2022, 16:00  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Seeley's 'Complex Powers of an Elliptic operator'

Alberto Richtsfeld (UP)

In this talk, I will review Seeley's groundbreaking paper 'Complex Powers of an Elliptic Operator'. In this paper, he defines complex powers of an elliptic, classical pseudo-differential operator... 

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07.11.2022, 13:00  –  Campus Golm, House 9, Room 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

On Stochastic Differential Equations with Jumps of Marcus-Type

Martha Nansubuga (HU Berlin)

We study stochastic differential equations (SDEs) driven by semimartingales with jumps, where the jumps of the solution are obtained as small relaxation time limits of fast curvilinear motions along... 

mehr erfahren

04.11.2022, 11:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

The noncommutative torus as a Rieffel deformation

Carolina Neira (Universidad Nacional, Bogotá)

In this talk we will view the noncommutative torus as a deformation of an appropriate C*-algebra following Rieffel's definitions, and define pseudodifferential operators on this quantum space.

First... 

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04.11.2022, 14:15  –  Room 2.22 (Zoom stream)
Öffentlicher Vortrag

Condensed Mathematics

Peter Scholze (MPI Bonn)

Zoom stream of talk taking place at HU Berlin

One of the central notions of mathematics is the notion of a topological space: it captures the idea of a space with a notion of "nearness" of points.... 

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03.11.2022, 14:00-15:30  –  1.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

2D limit models in nonlinear elasticity: membranes, plates and Willmore surfaces

Claudia Grabs

Elastic deformations of thin plates include stretching, shearing and compression, as well as bending. As the thickness of the plate goes to zero, different limit theories arise, depending on the... 

mehr erfahren

02.11.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

An improved discrete Rellich inequality on the half-line

Borbola Gerhat (Prague)

Abstract

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28.10.2022, 11:00  –  Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Geometry for the continuous field of controlled rough paths

Alexander Schmeding (Nord Universitet, Norway)

In rough path theory one seeks to solve differential equations driven by rough signals (i.e. Hölder paths of low regularity). To this end one needs to take a close look at the technical setup enabling... 

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27.10.2022, 14:00-15:30  –  2.22 und Zoom
Geometric Analysis, Differential Geometry and Relativity

Causal Structure at Infinity and the Positive Mass Theorem

Peter Cameron

A spacetime is said to satisfy the Penrose property if every pair of points on past and future null infinity can be connected by a timelike curve. Penrose showed that this property fails in Minkowski... 

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27.10.2022, 16:00  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Index of Dirac operator on a globally hyperbolic spacetime with timelike boundary

Onirban Islam (UP)

The Atiyah-Singer index theorem is one of the monumental results in Mathematics of the last century. Various extensions of this theorem in the context of Riemannian geometry are available but a... 

mehr erfahren

26.10.2022, 8:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Quantum inequalities

Daniela Cadamuro (Uni Leipzig)

In quantum theory, certain observables may yield negative values even if their classical counterparts are nonnegative. This applies in particular to the averaged energy density in quantum field... 

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26.10.2022, 13:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Ein neuer Zugang zur Hot-Spots-Vermutung

Assoc.-Prof. Dr. Jonathan Rohleder (Stockholm University)

Die Hot-spots-Vermutung wurde 1974 von J. Rauch formuliert: der heißeste und kälteste Punkt in einem isolierten, homogenen Medium sollte für “die meisten” Anfangs-Wärmeverteilungen zum Rand... 

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26.10.2022, 4:00 pm  –  Golm, Haus 9, Raum 1.22
SIAM Chapter Seminar

Higher Order Laplacians on Simplicial Complexes

Philipp Bartmann

Abstract: As higher dimensional analogues of graphs, simplicial complexes appear in many areas of mathematics such as topology, combinatorics, data analysis and number theory. However, it is still... 

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26.10.2022, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

A view on multiple recurrence

Tanja Eisner (Leipzig)

Abstract: We discuss a proof of multiple recurrence for ergodic systems (and thereby of Szemerédi's theorem) being a mixture of three known proofs. It is based on a conditional version of the... 

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25.10.2022, 8:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Semiklassische Limiten durch maßgeschneiderte Pseudodifferenzialkalküle — Anwendungen auf Systeme ohne und mit Dissipation

Max Lein (Tohoku University)

Physikalisch gesehen verhalten sich mikroskopische, quantenmechanische Systeme vollkommen anders als makroskopische, klassische Systeme. Weil aber Quantenmechanik die grundlegendere physikalische... 

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25.10.2022, 10:15  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Irreversibility and Stability in Statistical Physics

Dr. Helge Dietert (Université Paris Cité und Sorbonne Université)

In statistical physics, an irreversible macroscopic behaviour can emerge from a reversible model through mixing by a transport operator (Landau damping). I will show how this can be captured... 

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25.10.2022, 13:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Topological insulators via coarse geometry

Matthias Ludewig (Uni Regensburg)

Topological insulators are certain materials or metamaterials featuring a topological non-triviality in their mathematical description. This feature typically manifests as a non-trivial class in the... 

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24.10.2022, 13:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Weakly self-avoiding walk in a random potential

Willem van Zuijlen (WIAS, Berlin)

We investigate a model of simple-random walk paths in a random environment that has two competing features: an attractive one towards the highest values of a random potential, and a self-repellent one... 

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24.10.2022, 8:00  –  Campus Golm, Haus 9, Raum 2.22
Öffentlicher Vortrag

Lorentzian length spaces - a synthetic approach to Lorentzian geometry

PD Dr. Clemens Sämann (University of Oxford)

I will introduce a synthetic approach to Lorentzian geometry akin to Alexandrov- or CAT(k)-spaces in metric geometry. The role of the metric is taken over by the time separation function, in terms of... 

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24.10.2022, 10:10  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Mathematics of Hearing the Shape of a Drum

Prof. Dr. Julie Rowlett (TU Chalmers, Schweden)

Have you heard the question "Can one hear the shape of a drum?" Do you know the answer? In 1966, M. Kac's article of the same title popularized the inverse isospectral problem for planar domains.... 

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24.10.2022, 15:00  –  Campus Golm, Haus 9, Raum 2.22 + zoom
Öffentlicher Vortrag

Die Geometrie von molekularen Schrödinger-Operatoren

Prof. Dr. Batu Güneysu (TU Chemnitz)

Ein klassisches Resultat von Kato besagt, dass die Eigenfunktionen eines molekularen Schrödinger-Operators global α-hölderstetig sind, für alle Hölderexponenten α≤1. Insbesondere folgt hieraus, dass... 

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24.10.2022, 12:50  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Über zeitharmonische Lösungen der Maxwellschen Gleichungen und verwandte Probleme der Fourier-Restriktionstheorie

PD Dr. Rainer Mandel (Karlsruher Institut für Technologie)

Die Maxwell’schen Gleichungen beschreiben die Ausbreitung elektromagnetischer Wellen in Abhängigkeit von Materialeigenschaften des Mediums und potentiell vorliegenden Ladungen und Strömen. In meinem... 

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24.10.2022, 17:10  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Öffentlicher Vortrag

Mathematical structures underlying perturbative quantum field theory

Dr. Kasia Rejzner (York University)

In this talk I will present a mathematically rigorous framework for perturbative quantum field theory. This framework, called perturbative algebraic quantum field theory (pAQFT), combines the idea of... 

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21.10.2022, 10:15 - 11:15  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Using 'Data-Intelligence' to Understand the Physics of the Inner Magnetosphere

Geoff D. Reeves, Los Alamos National Laboratory, USA

The Earth’s magnetosphere is a complex system composed of about a dozen major subsystems that are not only complex in-and-of themselves but also interconnected in complex, sometimes nonlinear ways. In... 

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21.10.2022, 10:00 ungewöhliche Zeit  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

Pseudodifferential Operators on the Noncommutative Torus

Carolina Neira (Universidad Nacional, Bogotá)

The noncommutative torus (NCT), or quantum torus, which is a mild noncommutative perturbation of the ordinary torus, is a prototypical object in noncommutative geometry.
Our main aim in this talk is... 

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20.10.2022, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

A generalization of the microlocal regularity theorem

Rubens Longhi (UP)

The theorem of microlocal elliptic regularity is useful to determine the singularities of the solution of linear partial differential equations on manifolds. It states that if \(P\) is a linear... 

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20.10.2022, 14:00-15:30  –  2.09.2.22, Zoom
Geometric Analysis, Differential Geometry and Relativity

Recent Estimates on the Bartnik mass

Annachiara Piubello (Universitiy of Miami)

In this talk, we will discuss some recent estimates on the Bartnik mass for data with non-negative Gauss curvature and positive mean curvature. In particular, if the metric is round the estimate... 

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12.10.2022, 17:30  –  Campus Golm, Haus 25, Hörsaal F1.01
Öffentlicher Vortrag

Towards Characterisation, Design and Function of 3D Entangled Materials

Prof. Dr. Myfanwy Evans

Hochschulöffentlicher Vortrag im Rahmen des Perspektivverfahrens von Prof Evans, Professorin für Angewante Geometrie und Topologie am Institut für Mathematik.

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11.10.2022, 9:45-10:15  –  Haus 9, Raum 2.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Mathematikunterricht im Nationalsozialismus

Frau Melanie Trudrung

Konnte der Mathematikunterricht zur Vermittlung der nationalsozialistischen Ideologie überhaupt genutzt werden? Ein Blick in die Schulbücher der damaligen Zeit macht deutlich, welche Bedeutung und wel... 

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28.09.2022, 4:00 pm  –  Golm, House 9, Room 1.22
SIAM Chapter Seminar

Optimal \(p\)-Hardy Weights on Locally Finite Graphs

Florian Fischer

Abstract: A natural classification of random walks is the one into recurrent and transient ones. This is equivalent to the non-/validity of the Hardy inequality for the energy functional associated... 

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26.09. bis 30.09.2022  –  Golm, Haus 9, Raum 2.22
Workshop

Geometry and Renormalisation Workshop

In recent decades, the search for a fundamental understanding of renormalization methods in quantum field theory has led to new mathematical structures and tools in various areas of mathematics,... 

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19.09. bis 21.09.2022  –  Campus Griebnitzsee, Building 6
Konferenz

Symposium on Inverse Problems: From experimental data to models and back - SFB Potsdam DA Days

The joint ‘Symposium on Inverse Problems: From experimental data to models and back’, is co-organized by the SFB 1456 Mathematics of Experiment, SFB 1294 Data Assimilation and the Gesellschaft für... 

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19.09. bis 22.09.2022  –  Potsdam
Workshop

Workshop on Functional Analysis, Operator Theory and Dynamical Systems

Organizers

  • Ram Band (Israel Institute of Technology)
  • Siegfried Beckus (University of Potsdam)
  • Jonathan Breuer (Hebrew University)
  • Matthias Keller (University of Potsdam)
  • Daniel Lenz... 
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13.09. bis 14.09.2022  –  Campus Griebnitzsee, Building 6
SFB 1294 - Annual Meeting

SFB Annual Meeting

tba

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30.08.2022, 10:15  –  Campus Golm, Building 25, Room F0.01
Kálmán Lecture

5th Kálmán Lecture with Nicolas Chopin

Nicolas Chopin , ENSAE, Institut Polytechnique de Paris, France

Nested cubing integration: how to get a O(N{-10}) error when you compute your favourite integral

This talk will explain why computing integrals remains such an important task in applied mathematics,... 

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29.07.2022, 11:30 (mind time)  –  Golm, Haus 9, 2.22 und online
Arbeitsgruppenseminar Analysis

The biharmonic Steklov operator on differential forms

Georges Habib (Lebanese University, Beirut)

In this talk, we shall introduce the notion of  biharmonic Steklov operator, which we then extend  to differential forms. The definition is motivated by the extension of the Serrin problem to... 

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28.07.2022, 16:15  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Local index theory for Lorentzian manifolds

Christian Bär

We prove a local version of the index theorem for Dirac-type operators on globally hyperbolic Lorentzian manifolds with Cauchy boundary. In case the Cauchy hypersurface is compact, we do not assume... 

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22.07.2022, 14:00 ungewöhnlich  –  Online Seminar
Arbeitsgruppenseminar Analysis

Lineup polytopes in physics

Federico Castillo (Catholic University of Chili)

Motivated by an instance of the quantum marginal problem in physics, we define the r-lineup polytope of P as a polytope parametrizing all possible linear orders on the vertices of P. We focus on the... 

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21.07. bis 21.07.2022, 14:00-15:30  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Solving initial data for Kaluza-Klein spacetimes

Caterina Vâlcu

We study the constraint equations for Einstein equations on manifolds of the form $\mathbb{R}^{n+1}\times T^m$, where $T^m$ is a flat m-dimensional torus. Spacetimes with compact directions were... 

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15.07.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

A Young-type Euler-Maclaurin Formula

Carlo Bellingeri (TU Berlin)

Considered one of the key identities in classical analysis, the Euler-McLaurin formula is one of the standard tool to relate sums and integrals, with remarkable applications in many areas of... 

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14.07. bis 14.07.2022, 14:00-16:00  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Construction and properties of free boundary minimal surfaces

Giada Franz

A free boundary minimal surface (FBMS) in a given three-dimensional Riemannian manifold is a critical point of the area functional with respect to variations that constrain its boundary to the... 

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14.07.2022, 14:00-16:00  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Free boundary minimal surfaces in the unit ball

Mario Schulz

The case of the Euclidean unit ball as ambient manifold for free boundary minimal surfaces arises naturally in the study of extremal metrics for Steklov eigenvalues on surfaces with boundary and is
... 

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14.07.2022, 16:00  –  2.09.0.14
Forschungsseminar Differentialgeometrie

Geometry of Lie Groups

Christian Bär

mehr erfahren

13.07.2022, 14:00  –  Online Meeting
Institutskolloquium

The Kinetic Theory of a Plasma

Mikaela Iacobelli (ETH Zurich) und Toan Nguyen (Penn State University)

14:00 Mikaela Iacobelli (ETH Zurich): Stability and singular limits in plasma physics

15:15 Toan Nguyen (Penn State University): Landau damping in plasma physics

Wenn Sie digital an den Vorträgen... 

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13.07.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

On some Mathematical Systems Theory in Banach spaces.

Christian Seifert (Technische Universität Hamburg)

Abstract: Given an abstract Cauchy problem in a Banach space we consider two questions:
1. Can we steer the system to any given state (or to zero, say) in finite time by some inhomogeneity?
2. Can we... 

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13.07.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Multiple sums and integrals associated with planar rooted trees

Yannic Vargas (Weierstrass Institute)

We investigate and compare two different ways of associating  multiple sums and multiple integrals to a certain class  of planar rooted trees (Schröder trees). These give rise to characters on the... 

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11.07.2022, 10:00  –  Campus Golm, 2.09.2.22 (hybrid)
Forschungsseminar Statistik

Nonparametric estimation of the Lévy density

Céline Duval (Université de Lille)

We consider the problem of estimating the Lévy density of a pure jump Lévy process, possibly of infinite variation, from the high frequency observation of one trajectory. To directly construct an... 

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08.07.2022, 10:15-11:15  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Symmetry-informed model inference for active matter

Jörn Dunkel, Massachusetts Institute of Technology, USA

Recent experimental advances enable high-resolution observations of biological and synthetic active matter across a wide range of length and time scales. A major interdisciplinary challenge is to... 

mehr erfahren

08.07.2022, 11:00  –  Online seminar
Arbeitsgruppenseminar Analysis

Planar branched zeta values and associated multiple sums and integrals

Yannic Vargas (Weierstrass Institute)

We investigate and compare two different ways of associating  multiple sums and multiple integrals to a certain class  of planar rooted trees (Schröder trees). These give rise to characters on the... 

mehr erfahren

07.07. bis 07.07.2022, 14:00-16:00  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Stability of the Spacetime Penrose Inequality in the AF Spherically Symmetric Case

Emily Schaal

We formulate the almost rigidity statement associated with the spacetime version of Penrose inequality, and establish it under the assumption of spherical symmetry in all dimensions. In particular, it... 

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07.07.2022, 16:00  –  2.09.0.14
Forschungsseminar Differentialgeometrie

Order-preserving isomorphisms of algebras of pseudo-differential operators

Alessandro Contini (Leibniz University Hanover)

In 1971 Egorov proved his famous Theorem, stating that conjugating a pseudo-differential operator with an invertible Fourier Integral Operator produces a new \(\Psi\)DO with the same principal symbol.... 

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06.07.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Semi-linear elliptic inequalities on weighted graphs

Xueping Huang (Nanjing University)

Abstract: We consider the discrete analogue of  semi-linear differential inequalities on weighted graphs. Under some technical conditions, we obtain almost sharp volume growth criteria for the... 

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04.07.2022, 10:00  –  Campus Golm, 2.09.2.22 (hybrid)
Forschungsseminar Statistik

About a data-based tight frame

Franziska Göbel

Function systems are widely used in mathematics to adress various questions like approximation, compressing and denoising of functions. Famous examples are the Fourier basis and wavelets which are... 

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01.07.2022, 10:30 - 11:30  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Additional SFB Colloquium with Mercator Fellows Sean Meyn and Youssef M. Marzouk

Sean Meyn (University of Florida) and Youssef M. Marzouk (MIT)

A Not So Random Walk around Extremum Seeking Control  - Sean Meyn

How can you optimize a function based on observations, without any way of computing a gradient? Kiefer and Wolfowitz proposed a... 

mehr erfahren

01.07.2022, 11:00  –  Golm, Haus 9, 2.22 und online
Arbeitsgruppenseminar Analysis

Orthogonal and special linear invariants of paths via the iterated-integral signature

Rosa Preiss (University of Potsdam)

Looking at the action of the orthogonal group on a path in a finite dimensional real vector space, we apply Fels-Olver’s moving frame method paired with the log-signature transform to construct a set... 

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30.06. bis 30.06.2022, 14:00-16:00  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

The MOTS-stability spectral problem: when `non-normal' is generic

José Luis Jaramillo

The spectral theorem provides a powerful tool to study physical systems 
controlled by a self-adjoint or, more generally, normal operator. The situation changes  qualitatively when the normal... 

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29.06.2022, 14:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Institutskolloquium

Open access scientific publications

Marie Farge (ENS, Paris) und Dieter Meschede (DPG, Bonn)

14:00 Marie Farge (ENS, Paris): The Diamond Open Access: a model for researchers and funding agencies to recover control of their articles

14:45 Tee und Kaffee Pause

15:15 Dieter Meschede (DPG, Bonn):... 

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29.06.2022, 4:00 pm  –  Golm, Haus 9, Raum 0.17
SIAM Chapter Seminar

Stochastic differential equations - application, simulation and parameter estimation

Jan Martin Nicolaus

Abstract:

Differential equations are ubiquitous throughout most topics of applied mathematics, physics and engineering.

The study of stochastic differential equations (SDEs) enables the modeling and... 

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29.06.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Leptin densities in amenable groups

Christoph Richard (Erlangen)

Abstract: We define a notion of uniform density on translation bounded measures in unimodular amenable locally compact Hausdorff groups, which is based on a group invariant introduced by Leptin in... 

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23.06.2022, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

A Gutzwiller Trace formula for Dirac Operators on a Stationary Spacetime

Onirban Islam

A Duistermaat-Guillemin-Gutzwiller trace formula for a Dirac-type operator D on a globally hyperbolic spatially compact standard stationary spacetime \((M,g,Z)\) is achieved by generalising the recent... 

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23.06. bis 23.06.2022, 14:00-15:30  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Higher-dimensional Majumdar-Papapetrou black holes

James Lucietti

The uniqueness theorems for asymptotically flat, static, black hole solutions to Einstein-Maxwell theory in four and higher dimensions are only valid for non-extreme black holes.  

In the extreme case... 

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22.06.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Non-stationary Furstenberg Theorem and Anderson Localization

Anton Gorodetski (UCI)

Abstract: In this talk we will formulate a non-stationary version of the Furstenberg Theorem on random matrix products. As a main application we will discuss how it can be used to prove a... 

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21.06.2022, 13:00  –  Raum 2.22 Haus 9, Golm
Forschungsseminar Wahrscheinlichkeitstheorie

Introduction to Hawkes Processes

Laetitia Colombani (U Toulouse)

Hawkes processes were introduced by Hawkes in 1971, and are widely used in many applications (earthquakes, neurons, social network, finance, etc.) They are random point processes on the real line, and... 

mehr erfahren

20.06.2022, 10:00  –  Golm, Haus 9 Raum 2.22 + Zoom
Forschungsseminar Statistik

Structured Pure Exploration Bandit Problems

James Cheshire

We will consider several multi armed bandit problems (MAB), with a focus on structured, pure exploration bandit problems. We will first identify the minimax rate for the Thresholding Bandit Problem... 

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17.06.2022, 10:15-11:30  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Collective dynamics in the social and data science

Marie-Therese Wolfram, University of Warwick, UK

Collective dynamics can be observed in many situations in our daily lives, for example the motion of bird flocks, the formation of directional lanes in pedestrian flows or opinion dynamics on social... 

mehr erfahren

16.06.2022, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

On the spectrum of the Rarita-Schwinger operator on the Berger Spheres

Peter Grabs (UP)

We look at what might be involved in determining the above.

mehr erfahren

15.06.2022, 14:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Institutskolloquium

Vorstellungen und Lernpfade von Schülerinnen und Schülern zur Geometrie

Kirstin Erath (Uni Halle) und Alexander Salle (Uni Osnabrück)

14:00 Kirstin Erath (Uni Halle): Herausforderungen auf dem Lernpfad zum Ähnlichkeitsbegriff

14:45 Tee und Kaffee Pause

15:15 Alexander Salle (Uni Osnabrück): Grundvorstellungen und individuelle... 

mehr erfahren

13.06.2022, 13:00  –  Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Convergence of Random Walks towards Skew Brownian motion

Andrey Pilipenko (Acad. of Science, Kyiv)

We consider the random motion of a particle, whose jumps outside of a bounded set (membrane) are mean-zero i.i.d.  with a finite second moment. Jumps from the membrane have other finite mean... 

mehr erfahren

13.06.2022, 10:00  –  Golm, Haus 9, Raum 2.22 (hybrid: Zoom)
Forschungsseminar Statistik

Empirical Graph-Laplace-Approximation of Laplace-Beltrami Operators: Behavior of Eigenspaces

Maximilian Graf

The Laplacian Eigenmaps algorithm as a non-linear dimensionality reduction method was introduced by Belkin and Niyogi in 2001. Key objects are the Graph-Laplace-Matrix and the related... 

mehr erfahren

03.06.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Comparison of (co)symbols of pseudodifferential operators on filtered manifolds

Shantanu Dave (University of Vienna)

A filtered manifold is a manifold with a graded (noncommutative) group structure on its tangent space. These include familiar examples of foliations and contact structures. The new group structure on... 

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02.06.2022
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

mehr erfahren

02.06. bis 02.06.2022, 14:00-15:30  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Huisken-Yau-type uniqueness for area-constrained Willmore spheres

Jan Metzger

Let (M, g) be a Riemannian 3-manifold that is asymptotic to Schwarzschild. We study large area-constrained Willmore spheres $\Sigma\subset M$ with non-negative Hawking mass and inner radius $\rho$... 

mehr erfahren

31.05.2022, 12:30  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Percolation of the level set of the Gaussian Free Field on a Galton-Watson tree.

Gioele Gallo (Köln)

The study of Gaussian free field level sets on supercritical Galton-Watson trees has been initiated by Abächerli and Sznitman. We continue this investigation by means of different tools in order to... 

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31.05.2022, 13:00 Uhr  –  Haus 29, Raum 0.25/0.26 (Präsenzveranstaltung)
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Disputation Maximilian Schanner

Maximilian Schanner

Liebe Kolleginnen, liebe Kollegen,

ich möchte Sie auf folgende Veranstaltung hinweisen:

 

Verteidigung der Doktorarbeit von

 

Maximilian Schanner

"Correlation based modeling of the archeomagnetic... 

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30.05.2022, 10:00  –  hybrid (room 2.9.2.22 and on zoom)
Forschungsseminar Statistik

Statistics at the IQTIG - Analyzing Health Care Data

Maurilio Gutzeit

We start with a short introduction to the IQTIG (Institut für Qualitätssicherung und Transparenz im Gesundheitswesen) as a key player in quality insurance in the German health care system and to the... 

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30.05.2022, 13:00  –  Golm, Haus 9 Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Random Dynamics in Collective Behaviour - Consensus, Clustering and Extinction of Populations

Jens Fischer (Toulouse, UP)

Social network models are a common tool to further the understanding of relation based interactions in societies. Nonetheless, a complete mathematical understanding is lacking due to the complexity of... 

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25.05.2022, 16:00  –  Campus Golm, building 9, room 0.17
SFB-Seminar

Learning in High-Dimensional Feature Spaces Using ANOVA-Based Fast Matrix-Vector Multiplication

Theresa Wagner, TU Chemnitz

Kernel matrices are crucial in many learning tasks and typically dense and large-scale. Depending on the dimension of the feature space even the compu- tation of all its entries in reasonable time... 

mehr erfahren

25.05.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Laplacians on Riemann surfaces and Graphs

Noema Nicolussi (Potsdam)

There are many interesting parallels between analysis on Riemann surfaces and graphs. Both settings admit a Laplace operator and the Poisson equation reflects crucial geometric information.

Motivated... 

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23.05.2022, 10:15  –  Golm Haus 9 Raum 2.22 (hybrid - zoom)
Forschungsseminar Statistik

Robust estimation of discrete distributions under local differential privacy

Julien Chhor

Joint work with Flore Sentenac (CREST)


Although robust learning and local differential privacy are both widely studied fields of research, combining the two settings is an almost unexplored topic. We... 

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23.05.2022, 13:00  –  Campus Golm, Building 9, Room 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Population models with seed bank: construction, duality and tree properties

Marta Dai Pra (HU Berlin)

This talk focuses on the study of population models with a seed bank, in particular presenting their construction from classical models, some duality results and tree properties.The first part is an... 

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20.05.2022, 14:15  –  Auditorium Maximum, Haus 8, Am Neuen Palais
Öffentlicher Vortrag

Euler Vorlesung 2022

Prof. Dr. Wolfgang Lück

Titel: A Panorama of L2-Invariants

Abstract: We give a gentle survey about L2-invariants such as L2-Betti numbers and L2-torsion. They are modelled on their classical counterparts and defined in terms... 

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20.05.2022, 11:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Arbeitsgruppenseminar Analysis

An algorithm for distributing weight over a finite graph (and its relation with Shintani zeta functions)

Diego Lopez (Uni Potsdam)

In this talk we will describe an algorithm to distribute some "n-dimensional weight" over the vertices of a graph, such that the weight on each vertex remains higher than a given bound. We will then... 

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19.05.2022, 16:00-17:30  –  2.09.0.14
Forschungsseminar Differentialgeometrie

Non-local boundary conditions for the Dirac operator on spacetimes with timelike boundary

Penelope Gehring

Non-local boundary conditions - for example the Atiyah-Patodi-Singer (APS) conditions -  for Dirac operators on Riemannian manifolds are rather well-understood, while not much is known for such... 

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18.05.2022, 14:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Institutskolloquium

Amenability — From the Banach-Tarski paradoxon to Gromov’s monster groups

Kristin Courtney (Uni Münster) und Siegfried Echterhoff (Uni Münster)

14:00 Kristin Courtney (Uni Münster): Approximations on Groups

14:45 Tee und Kaffee Pause

15:15 Siegfried Echterhoff (Uni Münster): Amenable group actions on spaces and operator algebras

Wenn Sie... 

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18.05.2022, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Uniformity of cocycles

Prof. Daniel Lenz (Universität Jena)

Abstract: Uniformity of continuous SL(2,R) valued cocycles over uniquely dynamical systems has featured in various contexts. Walters asked in '86 whether every uniquely ergodic system admits a... 

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18.05.2022, 13 Uhr  –  Golm, Haus 9, Raum 1.22 + Zoom
Verteidigung der Dissertation / Defence of the PhD thesis

Structure formation and identification in geometrically driven soft matter systems

Tobias Hain

Das Thema der von Tobias Martin Hain in der Wissenschaftsdisziplin " Mathematische Physik" eingereichten Dissertation lautet:

Structure formation and identification in geometrically driven soft matter... 

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16.05.2022, 13:00  –  Campus Golm, Building 9 Room 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Bose-Einstein condensation: introduction and open problems

Alexander Zass (WIAS Berlin)

In this talk we present the open problem of Bose--Einstein condensation. In the first part, we provide a
historical background and some physical heuristics for this state of matter that was first... 

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13.05.2022, 11:30 (unusual time!)  –  Campus Golm, Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

An Euler-MacLaurin formula for polyhedra

Mateo Spriet (Uni Toulouse)

The classical Euler-MacLaurin formula links the sum over integers of a single variable real function with its integral. In their article "Local Euler-MacLaurin formula for polytopes", Nicole Berline... 

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12.05.2022, 16:15-17:45  –  2.09.0.14
Forschungsseminar Differentialgeometrie

Feynman propagators for Wave-type and Dirac-type operators

Onirban Islam

It is a classic result that any normally hyperbolic operator on a globally hyperbolic spacetime admits unique advanced and retarded propagators. With the advent of quantum field theory, a new type of... 

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12.05. bis 12.05.2022, 14:00-15:30  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Singularities in mean convex mean curvature flow

Stephen Lynch

A compact hypersurface in Euclidean space moving by its mean curvature necessarily forms a singularity in finite time. The shape of the hypersurface near a singularity is described by an ancient... 

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12.05.2022, 15:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Modifications of Getzler's Grading Technique

Andrés Larrain Hubach (University of Dayton, Ohio)

Joint online scientific meeting with the American University of Beirut, Lebanese University in Fanar, and the University of Potsdam in the framework of the cooperation:
AT THE CONFLUENCE OF GEOMETRY,... 

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11.05.2022, 12:15-13:15  –  Campus Golm, Building 9, Room 1.10
Forschungsseminar

Toward a unified framework for large scale imaging problems: Theory, applications, and potential issues

Hossein S. Aghamiry, Université Côte d'Azur, Geoazur, Valbonne, France

Visualizing and quantifying the properties of a medium using sparse indirect measurements is the final goal of all the imaging methods in different fields. In this quest, inverse theory and... 

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09.05.2022, 13:00  –  Raum 2.22 und Zoom
Forschungsseminar Wahrscheinlichkeitstheorie

Order of the phase transition of a free Bose Gas

Anne Flöge (UP & WIAS Berlin)

We investigate the order of the phase transition in the free Bose gas and start with a criterion of a phase transition of order 2 for general q_k. Then we continue the analysis under a gamma... 

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06.05.2022, 10:15-11:15  –  Campus Golm, Building 9, Room 0.12
SFB-Seminar

Stochastic Modelling with few Parameters

Philipp Meyer, UFS Data-centric Sciences, University of Potsdam

Simple stochastic models can describe the fluctuations of a time series. A good way to get a first impression of the data is to look at the mean squared displacement. It describes how strong the data... 

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05.05.2022, 14:00-15:30  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Local foliations by critial surfaces of the Hawking energy and small sphere limit

Alejandro Penuela Diaz

The Hawking energy is one of the most famous local energies in general relativity, by using a Lyapunov Schmidt reduction procedure we construct  unique  local foliations of critical surfaces of the... 

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03.05.2022, 12:15 - 13:15  –  Campus Golm, Building 9, Room 1.22 (time and location changed!)
Forschungsseminar

Krylov methods for solving parameterized linear systems

Siobhan Correnty (KTH Stockholm)

We consider parameterized linear systems of the form $A(\mu) x(\mu) = b$ for many different $\mu$, where $A(\mu)$ is large, sparse and nonsingular, with a nonlinear dependence on $\mu$. In this work... 

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02.05.2022, 10:15  –  2.09.2.22 (hydrid - Zoom)
Forschungsseminar Statistik

Adversarial bandits with noisy side observations

Tomas Kocak

In this talk, we take a look at a partial-observability model for online learning problems where the learner, besides its loss, also observes some noisy feedback about the other actions, depending on... 

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29.04.2022, 10:15-11:15  –  Campus Golm, Building 28, Room 0.108
SFB-Kolloquium

Time scales in early warnings: a probabilistic approach

Susanne Ditlevsen, Department of Mathematical Sciences, University of Copenhagen, Denmark

In recent years there has been an increasing awareness of the risks of collapse or tipping points in a wide variety of complex systems, ranging from human medical conditions, pandemics, ecosystems to... 

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29.04.2022, 14:00 (unusual time!)  –  Online Meeting
Arbeitsgruppenseminar Analysis

Combinatorial Hopf Algebras and the Toric Variety of the Permutohedron

William Norledge (Penn State, US)

Abstract: We discuss a bimonoid structure on the toric variety of the permutohedron (=permutohedral space) with multiplication, resp. comultiplication, given by embedding, resp. projecting onto,... 

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28.04.2022, 15:00  –  Online Meeting
Arbeitsgruppenseminar Analysis

Renormalization of Feynman amplitudes by multiple zeta regularization

Viet Dang (Université Paris Cité)

Joint online scientific meeting with the American University of Beirut, Lebanese University in Fanar, and the University of Potsdam in the framework of the cooperation:
AT THE CONFLUENCE OF GEOMETRY,... 

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28.04. bis 28.04.2022, 14:00-15:30  –  C6H05 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

Symmetries in Hamiltonian systems and their impact on ODE and PDE problems

Sonja Hohloch

Hamiltonian systems are an important class of dynamical systems in mathematics, physics, and biology. In this talk, we will explain the impact and ramifications of an underlying S^1-symmetry on the... 

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25.04.2022, 13:00  –  Raum 2.22 + Zoom
Forschungsseminar Wahrscheinlichkeitstheorie

Hydrodynamic limits of particle systems

Julian Kern (ENS Lyon, Potsdam)

The Symmetric Simple Exclusion Process (SSEP) is a very important toy model in particle systems. I will use it and related processes to showcase some ideas from the theory of hydrodynamic limits which... 

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22.04.2022, 10:00-12:00  –  Campus Golm, Building 5, Room 1.10
SFB-Seminar

"Stochastic gradient descent in continuous time: discrete and continuous data" and "Augmenting Bayesian inference with possibility theory"

Jonas Latz (Heriot-Watt University, Edinburgh) & Jeremie Houssineau (University of Warwick, UK)

Jonas Latz:

Optimisation problems with discrete and continuous data appear in statistical estimation, machine learning, functional data science, robust optimal control, and variational inference. The... 

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22.04.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Pseudodifferential operators and Lie algebroids

Alfonso Garmendia (Barcelona)

The abstract will follow.

You are welcome to invite your friends and colleagues to join us! If you wish to attend the talks, please contact Sylvie Paycha paycha@math.uni-potsdam.de for the login... 

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21.04. bis 21.04.2022, 14:00-16:00  –  C6H05 Seminar room S09 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

On effects of the null energy condition on spacelike and timelike umbilical hypersurfaces in a class of static spacetimes

Markus Wolff

We study the effects of the null energy condition on both spacelike and timelike umbilical hypersurfaces in a class of static spacetimes. In the spacelike case, we study umbilical warped product... 

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20.04.2022, 14:00  –  Campus Golm, Haus 9, Raum 2.22 + Zoom
Institutskolloquium

Neue Begegnungen mit den reellen Zahlen

Detlef Spalt (Hessischer Landtag, Wiesbaden) und Karlheinz Spindler (Hochschule RheinMain, Wiesbaden)

14:00 Detlef Spalt (Hessischer Landtag, Wiesbaden): Die reellen Zahlen nach Karl Weierstraß - ein bislang unbekanntes Konstrukt, geschaffen vom traditionellen Denken

14:45 Tee und Kaffee Pause

15:15 K... 

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07.04. bis 07.04.2022, 15:00  –  Online
Arbeitsgruppenseminar Analysis

At the confluence of geometry, analysis and mathematical physics

Diverse

This is to announce the forthcoming sessions of a joint (online) seminar with two universities in Beirut, the Lebanese University (UL) and the American University of Beirut (AUB).

The seminar consists... 

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05.04. bis 06.04.2022, 09:00-18:00  –  Campus Am Neuen Palais, Hörsaal 1.02 im Haus 9
Workshop

Congrès MATh.en.JEANS 2022

Die Vereinigung MATh.en.JEANS veranstaltet jedes Jahr in den  französischen Schulen, Collèges und Gymnasien im Ausland sowie in  französisch- oder englischsprachigen Einrichtungen in Europa... 

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29.03.2022, 10:00-11:30  –  Campus Golm, Building 9, Room 2.22
SFB-Seminar

On the duality for nonlinear filtering

Jin W. Kim, University of Illinois at Urbana-Champaign, USA

In this talk, I will present the dual control system for the hidden Markov model (HMM). This is a direct extension of classical duality between observability and controllability of linear systems. The... 

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03.03.2022, 16:15  –  2.09.0.12
Forschungsseminar Differentialgeometrie

Why study random Schrödinger operators?

Mehran Seyedhosseini

I will first talk about the relationship between the spectral theory of Schrödinger operators and the dynamical properties of physical systems. I will then motivate the study of the spectral... 

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03.03.2022, ab 10:30  –  online scientific meeting
Arbeitsgruppenseminar Analysis

At the confluence of geometry, analysis and mathematical physics

Diverse

A joint online scientific meeting between the American University of Beirut, Lebanese University and University of Potsdam. This meeting, organized in the framework of the Research Group  Linkage... 

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23.02.2022, 4:00 pm  –  Hybrid (Zoom and room 2.22)

SIAM Chapter Seminar: Data assimilation and reinforcement learning in model-informed precision dosing

Franziska Thoma and Katherine Briceno Guerrero

Abstract: Model-informed precision dosing (MIPD) employs a combination of mathematical modelling and individual patient measurements to calculate optimal drug dose and maximize treatment success in... 

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22.02.2022, 10:00  –  Golm, Haus 9 2.22 and Zoom
Forschungsseminar Statistik

Modelling Online Learning with Computability Theory

Karen Seidel

Abstract:  In machine learning, algorithms generalise from available training data to unseen situations.
The engineering practices used in the respective technologies are far from understood.
Research... 

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21.02. bis 25.02.2022  –  Online Tagung
Konferenz

Microlocal and Global Analysis, Interactions with Geometry

different Speakers

We have the pleasure to invite you to the next edition of a series of meetings initiated by Professor Schulze devoted to microlocal, singular and global analysis and their interactions with geometry... 

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18.02.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

The combinatorics and geometry of rough paths

Emilio Rossi Ferrucci (Imperial College, London)

I will begin by introducing geometric (controlled) rough paths from the algebraic/combinatorial point of view, as done in recent work with Cass, Litterer and Driver. Geometric rough paths can be... 

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17.02.2022, 16:15  –  Online via zoom
Seminar Geometrie

Gromov’s cube conjecture II

Artem Nepechiy

Zoom link available at this moodle.

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16.02.2022, 14:00  –  Online Colloquium
Institutskolloquium

Aspects of the global theory of minimal surfaces and harmonic maps

Lynn Heller (Leibniz University, Hannover) und Markus Röser (University of Hamburg)

2 pm: Lynn Heller (Leibniz University, Hannover): Minimal and constant mean curvature surfaces in the 3-sphere

3 pm: Markus Röser (University of Hamburg): Harmonic maps and the Deligne--Hitchin... 

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16.02.2022, 10:00  –  Online (Zoom)
Forschungsseminar Statistik

Interacting Hawkes processes with multiplicative inhibition

Celine Duval (Université de Paris)

Abstract: After a shot introduction on Hawkes processes, we introduce a general class of mean-field interacting nonlinear Hawkes processes modelling the reciprocal interactions between two neuronal... 

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15.02. bis 15.02.2022, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

A Lorentzian analog for Hausdorff dimension and measure

Clemens Sämann

We define a one-parameter family of canonical volume measures on Lorentzian (pre-)length spaces. In the Lorentzian setting, this allows us to define a geometric dimension - akin to the Hausdorff... 

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14.02.2022, 16:15  –  Raum 0.12
Forschungsseminar Differentialgeometrie

Die Pfaff'sche

Dominik Ulrich

Die Determinante ist eine wichtige Kenngröße quadratischer Matrizen und jeder, der auch nur ein Semester Mathematik studiert hat, hat bereits von ihr gehört. Aber wussten sie zum Beispiel, dass die... 

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11.02.2022, 14:00 Uhr  –  Zoom-Videokonferenz
Öffentlicher Vortrag

UN Tag - "Women in Science"

(English? click here)

Wissenschaftlerinnen zur Zeit von Corona

Der Beginn der Corona-Pandemie jährt sich diesen Winter zum zweiten Mal. Nach wie vor ist der Alltag aller stark durch diese... 

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11.02.2022, 2 pm  –  Zoom Video Conference
Öffentlicher Vortrag

International Day - "Women in Science"

(Deutsch? Hier klicken)

Women Scientists during the time of COVID

This winter marks the second anniversary of the start of the Corona pandemic. Everyone's daily life continues to be strongly... 

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11.02.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Renormalisation of Rough Paths

Ludwig Rahm (NTNU, Trondheim, Norway)

Rough path theory is of interest to solve differential equations driven by paths of low regularity. In this talk, I will first give an introduction to rough path theory and then discuss... 

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08.02. bis 08.02.2022, 12:15-13:45  –  Room C9A03 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

On equipotential photon surfaces in (electro-)static spacetimes of arbitrary dimension

Olivia Vicanek-Martinez

In my talk, we will study photon surfaces, namely timelike, umbilic hypersurfaces, in static, asymptotically flat, n + 1-dimensional spacetimes, possibly carrying a time-independent electric... 

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07.02.2022, 16:15  –  Raum 0.12.
Forschungsseminar Differentialgeometrie

Heat expansion and eta invariant for certain non-selfadjoint elliptic operators

Alberto Richtsfeld

In this talk, I will present a slightly generalized version of the Atiyah-Patodi-Singer Index Theorem for Differential Operators with normal adapted boundary operators. This will lead to a version of... 

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04.02.2022, 11:00  –  Hybrid, Online und 2.22
Arbeitsgruppenseminar Analysis

In how far are rough paths characterized by their signature?

Rosa Preiss (Uni Potsdam)

The aim of this talk is to give a definite answer to the question posed (in its earliest form) by Chen some 65 years ago, whether or not the signature, i.e. the full time increment footprint in the... 

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03.02.2022, 16:15  –  Online via zoom
Seminar Geometrie

Gromov’s cube conjecture I

Bernhard Hanke

Zoom link available at this moodle.

mehr erfahren

01.02.2022, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

The classical Dirac operator on spacetimes with timelike boundary

Penelope Gehring

Second order operators, such as wave operators, are some of the most studied objects in mathematics as well as in physics. On the other hand, the properties of first order operators are still not as... 

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31.01.2022, 16:15  –  2.09.0.12
Forschungsseminar Differentialgeometrie

Wave front sets of different regularity

Rubens Longhi

The usual notion of wavefront set identifies the directions along which a distribution \(u\) fails to be smooth. We present an equivalent definition that makes use of the Radon transform and which is... 

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28.01.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

The moving frame method for iterated-integrals signatures: orthogonal invariants

Nikolas Tapia (Weierstrass Institut, Berlin)

Geometric features robust to noise of curves in Euclidean space are of great interest for various applications such as machine learning and image analysis. We apply Fels-Olver’s moving frame method... 

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27.01.2022, 16:15  –  Online via zoom
Seminar Geometrie

The band width estimates

Georg Frenck

Zoom link available at this moodle.

mehr erfahren

26.01.2022, 10:00 - 12:00  –  Wias - online (zoom)
Forschungsseminar Statistik

Some methods based on couplings of Markov chain Monte Carlo algorithms

Pierre Jacob (ESSEC Paris)

Abstract: Markov chain Monte Carlo algorithms are commonly used to approximate a variety of probability distributions, such as posterior distributions arising in Bayesian analysis. I will review the... 

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26.01.2022, 13.30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Spectral asymptotic and positivity for singular Dirichlet-to-Neumann operators'

Ali Ben Amor (Gabès, Tunisia)

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25.01. bis 25.01.2022, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

Bubbling phenomena for sign-changing solutions of critical elliptic equations of Schrodinger-Yamabe type

Bruno Premoselli

In this talk, we consider sign-changing solutions of critical Yamabe-Schrodinger type equations of second order. Unlike their positive counterpart these solutions have no direct physical or... 

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25.01.2022, 10:00  –  hybrid - Golm 2.9.02.22 and zoom
Forschungsseminar Statistik

Category identification in the multi armed bandit setting

James Cheshire

Abstract: We consider a stochastic multi armed bandit problem with potentially infinite arms, with the assumption that the arm set can be partitioned into an unknown number of \(K\) distinct... 

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24.01.2022, 16:15  –  Raum 0.12
Forschungsseminar Differentialgeometrie

Die Klassifikation der Kreuzprodukte

Vanessa Hahn (UP)

Die Definition des Kreuzproduktes auf \(\mathbb{R}^3\) ist uns bekannt. Nun stellen wir uns die Frage, in welchen Dimensionen wir ein solches noch definieren können und welche Eigenschaften dieses... 

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21.01.2022, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Simplicial objects and combinatorial bialgebras

Joachim Kock (University of Barcelona)

The classical constructions of coalgebras and bialgebras from posets, monoids, Möbius categories, operads, and restriction species have a common generalisation to /decomposition spaces/... 

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18.01. bis 18.01.2022, 12:15-13:45  –  Room C9A03 Tübingen, 2.09.2.22 Campus Golm,
Geometric Analysis, Differential Geometry and Relativity

Black Hole and Equipotential Photon Surface Uniqueness in Electrovacuum

Albachiara Cogo

Equipotential Photon Surfaces are timelike and totally geodesic hypersurfaces in a static spacetime, such that the lapse function and the electric potential are constant at each time on their... 

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18.01.2022, 10:00 - 12:00  –  online (Zoom)
Forschungsseminar Statistik

Optimal Biisotonic Matrices Ranking for a Crowdsourcing Model

Emmanuel Pilliat

Abstract: Consider a crowd sourcing problem where we have n experts and d tasks. The average ability of each expert for each task is stored in an unknown matrix M, which is only observed in noise and... 

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17.01.2022, 16:15  –  Online via zoom
Forschungsseminar Differentialgeometrie

Møller operators for Dirac fields with MIT boundary conditions

Nicolò Drago (Trento)

Classical and quantum field theories are based on the study of the space of solutions to certain differential operators \(D\) (e.g. the Dirac operator) on globally hyperbolic spacetimes \((M,g)\) -... 

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14.01.2022, 10:15 - 11:30  –  building 28, room 0.108 (Campus Golm)
SFB-Kolloquium

Machine Learning in the context of drift

Barbara Hammer (Universität Bielefeld)

One of the main assumptions of classical machine learning models is that data are generated by a stationary concept. This is often violated due to unexpected events or outliers, sensor drift, or... 

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14.01.2022, 11:00  –  2.22 und online
Arbeitsgruppenseminar Analysis

Weakly parametric pseudodifferential calculus on Heisenberg modules

Gihyun Lee (MPI, Bonn)

A decade ago, Connes-Tretkoff interpreted the concept of intrinsic curvature in terms of noncommutative geometric language. Connes-Tretkoff worked on noncommutative tori, which are important examples... 

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13.01.2022, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

The long neck principle

Rubens Longhi

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12.01.2022, 14:00  –  Online Kolloquium
Institutskolloquium

Quasicrystals and the Fibonacci Hamiltonian

David Damanik (Rice University, Houston) und Marko Lindner (Hamburg University of Technology)

2 pm: David Damanik (Rice University, Houston): The Fibonacci Hamiltonian

3 pm: Marko Lindner (Hamburg University of Technology): Finite Sections of the Fibonacci Hamiltonian & Friends

David Damanik... 

mehr erfahren

11.01.2022, 16:30  –  Haus 9, Raum 2.22 und Zoom
Forschungsseminar Diskrete Spektraltheorie

The landscape law for tight binding Hamiltonians

Shiwen Zhang (University of Minnesota)

Abstract: The localization landscape theory, introduced in 2012 by Filoche and Mayboroda, considers the landscape function u solving Hu=1 for an operator H. The landscape theory has remarkable power... 

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11.01. bis 11.01.2022, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

Positive Energy Theorems in Fourth-Order GravityPositive Energy Theorems in Fourth-Order Gravity

Rodrigo Avalos

In this talk, we will analyse a recent notion of energy which is associated to fourth-order gravitational theories and plays an analogous role to that of the classical ADM energy in the context of... 

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11.01.2022, 10:00 - 12:00  –  hybrid - Golm room 2.9.2.22 or via Zoom (link on request)
Forschungsseminar Statistik

Adversarial bandits with side observations

Dr. Tomáš Kocák

Abstract: In the first part of the talk, we introduce the framework of adversarial bandits, compare it to stochastic bandits, and present the regret analysis for the EXP3 algorithm, that solves the... 

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10.01.2022, 16:15  –  2.09.0.12
Forschungsseminar Differentialgeometrie

Hyperelastic material models II

Claudia Grabs

Besides physical assumptions that need to be made on the energy density function of an hyperelastic material, there are several requirements that arise from the mathematical perspective. In order to... 

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03.01.2022, 16:15  –  Online via Zoom
Forschungsseminar Differentialgeometrie

The stringor representation of the string group

Matthias Ludewig (Regensburg)

We construct a representation for the string group String(d), realized as a strict 2-group, where by “representation” we mean a continuous strict homomorphism into the strict automorphism 2-group of a... 

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17.12.2021, 10:15 - 11:30  –  building 28, 0.108 (Campus Golm)
SFB-Kolloquium

Analyzing Multi-Messenger Astronomy Data to reveal fundamental Properties of the Cosmos

Tim Dietrich (University of Potsdam)

Neutron stars are among the most compact objects in the Universe and the detection of gravitational waves and electromagnetic signals from the merger of two neutron stars in 2017 has been a revolution... 

mehr erfahren

14.12. bis 14.12.2021, 12:15-13:45  –  room C9A03 Tübingen, room 2.09.2.22 Potsdam Golm
Geometric Analysis, Differential Geometry and Relativity

Local and global scalar curvature rigidity of Einstein manifolds

Klaus Kröncke

An Einstein manifold is called scalar curvature rigid if there are no compactly supported volume-preserving deformation of the metric which increase the scalar curvature. We give various... 

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13.12.2021, 16:15  –  Online via zoom
Forschungsseminar Differentialgeometrie

Global hyperbolicity in general relativity and in less regular theories

Ettore Minguzzi (Florence)

I discuss the properties of global hyperbolicity in general relativity and how its definition should be modified under low regularity assumptions.

Zoom access data are available at this moodle.

mehr erfahren

10.12.2021, 11:00  –  2.22 und online
Arbeitsgruppenseminar Analysis

Renormalization and Geometry in the Grosse-Wulkenhaar Model

Alexander Hock (Oxford University)

The Grosse-Wulkenhaar model (GW) is a euclidean scalar quantum field theory with quartic interaction on a non-commutative space, more precisely on the Moyal space. The most interesting property of... 

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09.12.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Spectral estimates for Callias operators

Alberto Richtsfeld

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07.12. bis 07.12.2021, 12:15-13:45  –  room C9A03 Tübingen, room 2.09.2.22 Golm
Geometric Analysis, Differential Geometry and Relativity

Rigidity of the spectral gap for non-negatively curved RCD spaces

Christian Ketterer

Rigidity of the spectral gap for non-negatively curved RCD spaces

First I will review results about the connection between spectral estimates and Ricci curvature for Riemannian manifolds and metric... 

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03.12.2021, 11:00  –  2.22 und online
Arbeitsgruppenseminar Analysis

Algebraic combinatorics approach to moment-to-cumulant relations in free probability

Yannic Vargas (University of Potsdam)

The study of relations between moments and cumulants plays a central role in both classical and non-commutative probability theory. In the last decade, the work of Patras and Ebrahimi-Fard   provided... 

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01.12.2021, 13:30  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Schreier graphs of self-similar groups as source of examples in spectral graph theory

Tatiana Smirnova-Nagnibeda (Genf)

Abstract: In this talk we will discuss some results in the spectral theory of infinite graphs obtained using techniques coming from the study of self-similar groups and their actions.

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30.11. bis 30.11.2021, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

Stability of timelike minimal surfaces in expanding spacetimes

Philip Thonke

The timelike minimal surface equation is a degenerate hyperbolic system describing the motion of a relativistic membrane, or p-brane. Using a harmonic map gauge, Olaf Milbredt has obtained local... 

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26.11.2021, 10:15 - 11:30  –  building 28, room 0.108 (Campus Golm)
SFB-Kolloquium

Towards Interactive AI-based Decision Support Systems

Enkelejda Kasneci (University of Tübingen)

The use of AI has improved computer-aided diagnosis systems in many areas. However, the underlying models are often black boxes that allow the user only limited control over the predictions, which can... 

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25.11. bis 26.11.2021, from 9 am  –  Campus "Am Neuen Palais"
Konferenz

Stochastic processes and statistical machine learning, III

Deutsch-Französisches DoktorandenKolleg Potsdam/Toulouse

The French-German graduate school Potsdam-Toulouse called Stochastic processes and statistical machine learning is funded by the French-German University for the period  2018-2021. Aims of this... 

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25.11.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Index theory for relative Dirac bundles

Jonas Rungenhagen

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24.11.2021, 14:00  –  Golm, Haus 9, 2.22 und Zoom
Institutskolloquium

Operator algebras on manifolds: from the boundaryless to the boundary case

Elmar Schrohe (Leibniz University Hannover) und Ryszard Nest (University of Copenhagen)

2 pm: Elmar Schrohe (Leibniz University Hannover): Introduction to a Theorem by Duistermaat and Singer

3:15 pm: Ryszard Nest (University of Copenhagen): Order Preserving Isomorphisms of Boutet de... 

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24.11.2021, 4:30 pm - 5:00 pm  –  Golm, Haus 9, Raum 2.22 and Zoom

SIAM Chapter Seminar: On the weighted asymptotic number of simplicial spanning trees in random \(k\)-regular simplicial complexes

Lior Tenenbaum

Abstract: In 1981, Mckay proved an asymptotic result regarding the number of spanning trees in random \(k\)-regular graphs. In this talk we will discuss an analogous result for random high dimensional... 

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24.11.2021, 13:30 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Graphs with positive spectrum

Bobo Hua (Fudan University Shanghai)

Abstract: We prove sharp l^2 decay estimates of nonnegative generalized subharmonic functions on graphs with positive Laplacian spectrum, which generalizes the result by Li and Wang on Riemannian... 

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23.11. bis 23.11.2021, 12:15_13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

Large area-constrained Willmore surfaces in asymptotically Schwarzschild 3-manifolds

Thomas Körber

In this talk, I will present recent work (joint with M. Eichmair) on large area-constrained Willmore surfaces in asymptotically Schwarzschild 3-manifolds. Using the method of Lyapunov-Schmidt... 

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23.11.2021, 10:00 Uhr  –  Golm, Haus 9 Raum 2.22 und Zoom
Forschungsseminar Statistik

Continuum-armed bandit : from the classical setting to the finite setting

Solenne Gaucher

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22.11.2021, 16:15  –  Raum 2.9.0.12
Forschungsseminar Differentialgeometrie

The Faddeev-LeVerrier algorithm

Christian Bär

The Faddeev-LeVerrier algorithm is an algorithm for the computation of the characteristic polynomial of a square matrix. It is slower than Gauss elimination but in contrast to the former it is... 

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18.11.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Relative Dirac bundles

Penelope Gehring

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17.11.2021, 10-12:00  –  WIAS and Zoom
Forschungsseminar Statistik

A geometric approach to fair online learning

Christophe Giraud

A Geometric Approach to Fair Online Learning

Abstract: Machine learning is ubiquitous in daily decisions and producing fair and non-discriminatory predictions is a major societal concern.
Various... 

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17.11.2021, 15 Uhr  –  Zoom
Institutsrat

Institutsratssitzung

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16.11. bis 16.11.2021, 12:15-13:45  –  Room C9A03 Tübingen, 2.09.2.22 Campus Golm
Geometric Analysis, Differential Geometry and Relativity

On the evolution of hypersurfaces along their inverse spacetime mean curvature

Markus Wolff

We introduce a new inverse curvature flow on asymptotically flat Initial Data sets $(M,g,K)$. In General Relativity, such a triple $(M,g,K)$ arises naturally as a spacelike hypersurface of... 

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15.11.2021, 16:15  –  2.09.0.12
Forschungsseminar Differentialgeometrie

Boundary value problems for Dirac Operators on graphs

Alberto Richtsfeld

In this talk, I will present the results of my master’s thesis concerning the index and the spectrum of Dirac operators on metric digraphs, which are subject to general boundary conditions. Relying on... 

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11.11.2021, 16:15  –  Online via Zoom
Seminar Geometrie

The classical Dirac operator

Helge Frerichs

Zoom link available at this moodle.

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10.11.2021, 13:30 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Characterizations of Forman curvature

Florentin Münch

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10.11.2021, 13:30 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Characterizations of Forman curvature

Florentin Münch (MPI Leipzig)

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09.11. bis 09.11.2021, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

Willmore surfaces in $\R^3$

Nicolas Marque

When one considers a surface in $\R^3$, the mean curvature quickly appears as a node of geometric insight, tying itself to isoperimetry, elasticity, and regularity.  From it one can naturally build a... 

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09.11.2021, 10:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Statistik

Epsilon Best Arm Identification in Spectral Bandits

Dr. Tomáš Kocák

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08.11.2021, 16:15  –  2.09.0.12
Forschungsseminar Differentialgeometrie

Hyperelastic material models

Claudia Grabs

An elastic material, for that the stress tensor field of a certain deformation can be derived as gradient tensor field from a scalar potential function (called strain energy density function) is... 

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08.11. bis 19.11.2021  –  Wien
Konferenz

Higher Structures Emerging from Renormalisation

We have the pleasure to invite you to an in-person Master Class and Workshop to take place at the Erwin Schrödinger Institute (ESI) in Vienna.

For more information about the Master Class, the worhop... 

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05.11.2021, 10:15 - 11:30  –  building 28, room 0.108 (Campus Golm)
SFB-Kolloquium

Coarse-graining of complex systems with parameter uncertainties

Carsten Hartmann (Brandenburgische Technische Universität Cottbus-Senftenberg)

Complex dynamical systems like molecular systems or stochastic climate systems often involve a variety of different time and length scales. We propose a general framework for coarse graining of such... 

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05.11.2021, 11:00  –  2.22 und online
Arbeitsgruppenseminar Analysis

Areas of areas determine the iterated-integral signature of a path: An updated overview

Rosa Preiss (University of Potsdam)

We consider the anti-symmetrization of the half-shuffle on words, which we call the "area"  operator since it corresponds to taking the signed area of elements of the iterated-integral signature. We... 

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04.11.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Clifford bundles and Dirac operators

Marten Steuer

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03.11.2021, 14:00  –  Online Colloquium
Institutskolloquium

Information theory in complex networks

Martin Roswall (University of Umeå, Sweden) und Karoline Wiesner (University of Potsdam, Germany)

2 pm Martin Roswall (University of Umeå): Mapping network flows with incomplete information

3:15 pm Karoline Wiesner (University of Potsdam): Information entropy in complex systems: Mathematical... 

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03.11.2021, 13:30 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Optimal large scale Gaußian upper bounds for heat kernels of unbounded graph Laplacians

Christian Rose (Universität Bremen)

Abstract: The heat kernel as the minimal fundamental solution of the heat equation is one of the most important objects studied in geometric analysis and encodes the geometry of the underlying space... 

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02.11. bis 02.11.2021, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

Motonicity theorems for minimal surfaces and linkedness of their boundary.

Manh Tien Nguyen

I will explain how each function whose Hessian is a multiple of the metric of a Riemannian manifold $M$ corresponds to a monotonicity theorem for minimal surfaces in $M$. When $M$ is the hyperbolic... 

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02.11.2021, 10:00  –  Campus Gol, Haus 9, Raum 2.22
Forschungsseminar Statistik

Shape Constrained Thresholding Bandit Problems

James Cheshire

mehr erfahren

01.11.2021, 16:15  –  2.09.0.12
Forschungsseminar Differentialgeometrie

Cauchy problems of the Dirac-Operator on spacetimes with timelike boundary

Penelope Gehring

Global boundary conditions for elliptic first order differential operators on Riemannian manifolds are rather well understood. Bär-Strohmaier introduced APS-conditions for the Lorentzian... 

mehr erfahren

29.10.2021, 10:00 (unusual time)  –  Online Seminar
Arbeitsgruppenseminar Analysis

L-infinity algebra and braided field theory

Marija Dimitrijevic Ciric (University of Belgrad, Serbia)

In this talk we discuss  braided $L_\infty$-algebras and their application in the construction of field theories on noncommutative (NC) spaces. We call these NC field theories, braided field theories.
... 

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27.10.2021, 10 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Dynamical systems with pure point spectrum

Daniel Lenz (Jena)

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26.10. bis 26.10.2021, 12:15-13:45  –  Room C9A03 Tübingen, 2.09.2.22 Potsdam Golm
Geometric Analysis, Differential Geometry and Relativity

Collapsing and noncollapsing in convex ancient mean curvature flow

Stephen Lynch

An important problem in mean curvature flow is to find conditions on initial data that rule out 'collapsing' singularity models, such as the Grim Reaper. This is a necessary step towards establishing... 

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25.10.2021, 16:15  –  2.09.0.12
Forschungsseminar Differentialgeometrie

Functorial extension of functional spaces on manifolds and vector bundles

Rubens Longhi

mehr erfahren

20.10.2021, 13:30 Uhr  –  Haus 9, Raum 2.22 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Optimal Hardy-type inequalities on lattices in stratified groups

Philipp Hake (Leipzig)

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20.10. bis 20.10.2021, 10:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar

Learning a Nash equilibrium in an imperfect information game through self-play

Dr. Pierre Menard

We will present the problem of learning a Nash equilibrium in an imperfect information game (IIG) through self-play. Precisely, we focus on two-player, zero-sum, episodic, tabular IIG under the... 

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20.10.2021, 15 Uhr  –  Zoom
Institutsrat

Institutsratssitzung

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19.10. bis 19.10.2021, 12:15-13:45  –  Room 2.09.2.22 Campus Golm, C9A03 Tübingen
Geometric Analysis, Differential Geometry and Relativity

Local Foliations of Constant Spacetime Mean Curvature Surfaces

Alejandro Penuela Diaz

Inspired by the small sphere limit for quasi-local masses we study local foliations of constant spacetime mean curvature surfaces, i.e. surfaces characterizing the center of mass in general... 

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15.10.2021, 11:00  –  Golm, Haus 9, Raum 2.22 und online
Arbeitsgruppenseminar Analysis

Renormalization as an Algebraic Birkhoff Decomposition

David Prinz (University of Potsdam)

In this talk, I will give an introduction to renormalization theory in the framework of Connes and Kreimer. To this end, I will start with a brief introduction to perturbative Quantum Field Theory.... 

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13.10.2021, 13:30 Uhr  –  Haus 9, Raum 2.22
Forschungsseminar Diskrete Spektraltheorie

Fiber entropy and algorithmic complexity of random orbits

Elias Zimmermann (Leipzig)

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13.10.2021, 17:30 Uhr
Institutsveranstaltung

Antrittsvorlesung Prof. Myfanwy Evans

Porf. Myfanwy Evans

Interdisziplinäre Vielfalt von "Tangling"

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08.10.2021, 11:00  –  Golm, Haus 9, Raum 2.22 und online
Arbeitsgruppenseminar Analysis

Lie Theory for Asymptotic Symmetries in General Relativity

David Prinz (University of Potsdam) and Alexander Schmeding (Nord Universitet, Bodo, Norway)

Abstract: It is well known that the Poincaré group is the symmetry group of special relativity. In general relativity, sensible symmetry groups exist only for special spacetimes: the so-called... 

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04.10.2021, 10:15  –  3.06.H05
Kálmán Lecture

4th Kálmán Lecture with Mihaela van der Schaar

Mihaela van der Schaar

Quantitative epistemology: conceiving a new human-machine partnership

Quantitative epistemology is a new and transformational area of research pioneered by our lab as a strand of machine learning... 

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01.10.2021, 10:15 - 11:15  –  2.14.0.21
SFB-Seminar

Lassi Roininen

Lassi Roininen, Technische Universität Lappeenranta, Finland

tba

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24.09.2021, 11:00  –  Online Seminar and 2.09.2.22
Arbeitsgruppenseminar Analysis

The Euclidean contour rotation in quantum gravity

John Barrett (Nottingham University)

The talk will discuss the rotation of the contour of functional integration in quantum gravity from Lorentzian geometries to Euclidean geometries. In the usual framework of metric tensors the... 

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22.09.2021, 15 Uhr  –  Zoom
Institutsrat

Institutsratssitzung

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16.09. bis 17.09.2021, 9:00  –  University of Potsdam, Griebnitzsee Campus
Workshop Datenassimilation

GAMM ANLA Workshop 2021

various speakers

The 21th Workshop of the GAMM Activity Group on Applied and Numerical Linear Algebra will take place in Potsdam from 16th‒17th September 2021  if circumstances permit. If the meeting cannot be held in... 

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14.09.2021, 13:00 - 14:00  –  2.27.1.01
SFB-Seminar

Towards next generation data assimilation algorithms for convective scale applications

Tijana Janjic Pfander, Ludwig-Maximilians-Universität München

The initial state for a geophysical numerical model is produced by combining observational data with numerical model simulation using a data assimilation algorithm. Particularly challenging is the... 

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14.09.2021, 14:30 - 15:30  –  2.27.1.01
SFB-Seminar

Transport methods for simulation-based inference and data assimilation

Youssef Marzouk, MIT (USA)

Many practical Bayesian inference problems fall into the "likelihood-free" setting, where evaluations of the likelihood function or prior density are unavailable or intractable; instead one can only... 

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14.09.2021, 16:00 - 17:00  –  2.27.1.01
SFB-Seminar

An Introduction to Actor Critic Methods for Optimal Control

Sean Meyn, University of Florida (USA)

The goal of actor critic methods is to estimate the best policy among a parameterized family for a controlled Markov chain.   Through the magic of Markov chain theory, it is possible to obtain... 

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14.09. bis 15.09.2021  –  Campus Golm
SFB 1294 - Annual Meeting

SFB 1294 - Kick-Off Meeting

with talks by Tjiana Pfander, Youssef Marzouk, Sean Meyn, Jana de Wiljes

We are kicking of the 2nd Phase of the SFB with a 1,5 day Kick-Off Event on the 14th and 15th of September.

This includes the annual SFB meeting, poster presentations by all projects to get to know... 

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23.07.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Lie_infinity algebras and classical field theory

Larisa Jonke (Ruđer Bošković Institute, Zagreb)

I will introduce the structure of Lie_infinity algebra in the context of gauge field theory and discuss its relation to BV-BRST and Hopf algebras.

You are welcome to invite your friends and colleagues... 

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21.07.2021, 15:00  –  Zoom
Institutsrat

Institutsratssitzung

mehr erfahren

16.07.2021, 10:15 - 11:15  –  online
SFB-Seminar

Stability of UQ and Bayesian inverse problems

Bjoern Sprungk

For partial differential equations with random coefficients we investigate the sensitivity of the distribution of the random solution with respect to perturbations in the input distribution for the... 

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16.07.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Milnor-Moore Theorem in the locality set up

Diego López (Uni Potsdam)

The Milnor-Moore Theorem, which was originally proved in 1965, describes the structure of a class of cocommutative Hopf algebras. In this talk I will discuss a generalization of the Milnor-Moore... 

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14.07.2021, 15:00!  –  Online Kolloquium
Institutskolloquium

Optimal design: methods and applications

Holger Dette (Ruhr-Universität Bochum, Germany) and John Stufken (UNC Greensboro, US)

Bitte geänderte Zeit beachten! Please mind the later starting time!

3 pm Holger Dette (Ruhr-Universität Bochum, Germany): Statistics, Geometry und Pharmacokinetics

4:15 pm John Stufken (UNC... 

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09.07.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

The variation of the trace of the heat-kernel on a manifold with boundary

Ihsane Malass (Uni Potsdam)

We present the well-known proof by Ray and Singer of the variation of the trace of the heat-kernel with respect to a family of metrics on a manifold with boundary under appropriate boundary... 

mehr erfahren

08.07.2021, 10h30
Verteidigung der Dissertation / Defence of the PhD thesis

Contributions to the theoretical analysis of algorithms with adversarial and dependent data.

Oleksandr Zadorozhnyi (Potsdam)

I overview the results contained in my thesis that studies theoretical guarantees of both sequential and batch learning algorithms that work with adversarial and dependent data. Firstly, I present... 

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05.07.2021, 14:00
Forschungsseminar Wahrscheinlichkeitstheorie

Lévy-driven transport equations

Ilya Pavlyukevich (Jena)

In case of SDEs driven by continuous semimartingales, it is well know that their Wong-Zakai approximations converge to Stratonovich SDEs, whereas in the jump case the so-called Marcus (canonical) SDEs... 

mehr erfahren

02.07.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Léon Rosenfeld and how historical studies can help to shed light on our striving for quantum gravity

Bernadette Lessel (MPI für Wissenschaftsgeschichte in Berlin)

Léon Rosenfeld, probably mostly known as a close collaborator of Niels Bohr, is considered to having been the first person to have ever attempted a quantization of the gravitational field in the... 

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28.06.2021, 14:00
Forschungsseminar Wahrscheinlichkeitstheorie

Emergence of interfaces from sandpile models

Wioletta Ruszel (Utrecht)

Interfaces separating two phases (e.g. water and ice) are created in phase coexistence situations such as at 0 degree Celsius. Random interface models are stochastic models which aim at explaining... 

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25.06.2021, 10:15 am  –  online
SFB-Kolloquium

Data assimilation simulation in cell biophysics problems

Tatsuo Shibata (RIKEN Center for Biosystems Dynamics Research, Japan)

Cellular signal transduction system is a complex reaction network consisting of many elements, which  allows cells to respond appropriately to external stimuli. In order to understand and predict such... 

mehr erfahren

25.06.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Relative Traces in Obstacle Scattering and the Casimir Effect

Florian Hanisch (Uni Potsdam)

In obstacle scattering, one is interested in properties of the Laplacian ∆ on the complement of a compact set O ("the obstacles") in Euclidean space, subject to certain boundary conditions. ∆ may be... 

mehr erfahren

23.06.2021, 15:00  –  Zoom
Institutsrat

Institutsratssitzung

mehr erfahren

18.06.2021, 10:15 - 11:15  –  online
SFB-Seminar

Analysis of stochastic gradient descent in continuous time

Jonas Latz

Analysis of stochastic gradient descent in continuous time

Stochastic gradient descent is an optimisation method that combines classical gradient descent with random subsampling within the... 

mehr erfahren

18.06.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

When Functional Calculus, Harmonic Analysis, and Geometry party together...

Lashi Bandara (University of Potsdam)

Functional calculus emerged in the latter half of last century as a convenient tool particularly in the analysis of partial differential equations. In the last thirty years, harmonic analysis has... 

mehr erfahren

17.06.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Analyticity of quasinormal modes in the Kerr and Kerr-de Sitter spacetimes

Oliver Lindblad Petersen (Stanford)

Quasinormal modes are fundamental in the study of wave equations on black hole spacetimes. In this talk, I will explain why the quasinormal modes in the Kerr and Kerr-de Sitter spacetimes are real... 

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16.06.2021, 14:00 - 15:45  –  Online Kolloquium
Institutskolloquium

Fractional stochastic PDEs: From statistical applications to numerical analysis

David Bolin (King Abdullah University of Science and Technology, Saudi Arabia) and Mihály Kovács (Pázmány Péter Catholic University, Hungary and Chalmers Uni/University of Gothenburg, Sweden)

2pm-2:45pm David Bolin (King Abdullah University of Science and Technology, Saudi Arabia): Statistical models and methods based on fractional stochastic PDEs

3pm-3:45 pm Mihály Kovács (Pázmány Péter... 

mehr erfahren

14.06.2021, 11:15
Verteidigung der Dissertation / Defence of the PhD thesis

A multifaceted study of marked Gibbs point processes

Alexander Zass

We present some results on the existence and uniqueness of marked Gibbs point processes. Firstly, we prove in a general setting the existence of an infinite-volume marked Gibbs point process, via the... 

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11.06.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

String geometry

Konrad Waldorf (University of Greifswald)

String geometry is to string theory what spin geometry is to gauge theory. String geometry can be studied via infinite-dimensional geometry and representation theory on loop spaces, or by... 

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11.06.2021, 9:00  –  Zoom
Informationsveranstaltung

Hochschulinformationstag - Das Institut für Mathematik stellt sich vor

Prof. Dr. Myfanwy Evans

In dieser Veranstaltung kann man das Institut und Studierende aus dem Fachschaftsrat kennen lernen. Außerdem geben wir einen Einblick in die Mathematik durch einen kurzen Vortrag zum Thema... 

mehr erfahren

09.06.2021, 13:30 Uhr
Forschungsseminar Diskrete Spektraltheorie

Safoura Zadeh (MFO Leibniz Fellow)

Safoura Zadeh (MFO Leibniz Fellow)

Please contact Siegfried Beckus (beckus@uni-potsdam.de) if you are interested to join the talk.

mehr erfahren

07.06.2021, 14:00
Forschungsseminar Wahrscheinlichkeitstheorie

Spatial and temporal central limit theorems for geodesic and horocycle flows on hyperbolic surface

Emilio Corso (ETH Zürich)

A leitmotif in probability theory is the discovery of universal, deterministic phenomena underlying the asymptotic behaviour, in a suitably defined sense, of random structures. In the ergodic theory... 

mehr erfahren

04.06.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

On vector bundle groupoids, principal bundles groupoids, their gauge group and their nerve

Alfonso Garmendia (Uni Potsdam)

We consider groupoids in the category of principal bundles, which we call principal bundles groupoids. We build  their ajoint bundle groupoids which we interpret as vector bundle groupoids, widely... 

mehr erfahren

03.06.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

An index theorem on asymptotically static spacetimes with compact Cauchy surface

Michał Wrochna (Cergy Paris Université)

A theorem due to Bär and Strohmaier (Amer. J. Math., 141 (5)) says that the Dirac operator on a Lorentzian manifold with compact Cauchy surface is Fredholm if Atiyah-Patodi-Singer boundary conditions... 

mehr erfahren

02.06.2021, 13:30 Uhr  –  Zoom
Forschungsseminar Diskrete Spektraltheorie

Wiener's lemma along subsequences.

Tanja Eisner (Leipzig)

Title: Wiener's lemma along subsequences.

Abstract: We discuss the validity of the classical Wiener lemma and the extremal behaviour of a measure on the unit circle via the behavior of its Fourier... 

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31.05.2021, 14:00  –  Zoom
Forschungsseminar Wahrscheinlichkeitstheorie

Feynman-Kac formula for 1st order perturbations of covariant Laplace-type operators

Batu Güneysu (UP)

Abstract:
It is a classical fact that one can represent the heat semigroup of a Schrödinger operator (that is, a perturbation of the Laplacian by a real-valued potential) as a path integral in terms... 

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28.05.2021, 10:15  –  online
SFB-Kolloquium

Understanding and predicting global biodiversity dynamics

Damaris Zurell (Universität Potsdam)

Almost 200 years ago, Alexander von Humboldt said in his famous Cosmos series that „all natural forces are linked together, and made mutually dependent upon each other“. Today, biodiversity and... 

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28.05.2021, 16:00  –  Zoom
Institutsveranstaltung

Euler Vorlesung

Prof. Fernando Codá Marques (Princeton University)

In diesem Jahr freuen wir uns Prof. Fernando Codá Marques (Princeton University) als Sprecher bei der Euler-Vorlesung begrüßen zu dürfen:

Titel: Morse theory for the area
Abstract: In this lecture we... 

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28.05.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Some aspects of groupoid techniques for pseudodifferential operators (PDOs)

Malte Leimbach (Uni Potsdam)

Following van Erp's and Yuncken's "Groupoid approach to pseudodifferential operators" I will discuss how one can use Connes' tangent groupoid and the "zoom-action" to define PDOs. I will point out... 

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27.05.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

A link between the 2D and 3D elastic moduli for isotropic homogeneous elastic materials

Claudia Grabs (UP)

There are many elastic moduli for isotropic elastic materials, such as the bulk modulus and the Youngs modulus, but they all are related to two basic material parameters, namely the Lamé parameters,... 

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26.05.2021, 14:00 - 15:45  –  Online Colloquium
Institutskolloquium

Concentration of measure: from functional inequalities to optimal transport theory

Radoslaw Adamczak (University of Warsaw) und Nathael Gozlan (Université Paris-Descartes)

2pm-2:45pm Radoslaw Adamczak (University of Warsaw): Concentration of measure and functional inequalities

3pm-3:45 pm Nathael Gozlan (Université Paris-Descartes): The two-periodic Aztec diamond

Abstra... 

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26.05.2021, 13:30 Uhr
Forschungsseminar Diskrete Spektraltheorie

Alexey Klimenko (HSE University Moscow)

Alexey Klimenko

Please contact Siegfried Beckus (beckus@uni-potsdam.de) if you are interested to join the talk.

mehr erfahren

21.05.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Hopf algebras as quantum spacetime symmetries and noncommutative gravity

Paolo Aschieri (Alessandria and Torino)

We recall how the geometry of noncommutative gauge fields naturally emerges in quantum field theory and string theory. In this context Hopf algebras in general replace the usual notion of symmetry... 

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20.05.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Scalar and mean curvature comparison via the Dirac operator

Rudolf Zeidler (Universität Münster)

In recent years, Gromov proposed studying the geometry of positive scalar curvature (psc) via various metric inequalities vaguely reminiscent of classical comparison geometry. For instance, let... 

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20.05.2021, 14:00
Forschungsseminar Wahrscheinlichkeitstheorie

A multifaceted study of marked Gibbs point processes

Alexander Zass (UP)

In this talk we present some results on the existence and uniqueness of marked Gibbs point processes. Firstly, we prove in a general setting the existence of an infinite-volume marked Gibbs point... 

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19.05.2021, 15:00  –  Zoom
Institutsrat

Institutsratssitzung

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19.05.2021, 13:30 Uhr  –  Zoom
Forschungsseminar Diskrete Spektraltheorie

Structure of Delone Sets, a Review

Jean Bellissard (University of Münster)

Please contact Siegfried Beckus (beckus@uni-potsdam.de) if you are interested to join the talk.

mehr erfahren

18.05.2021, 8:15-9:45
Gastvortrag

Markov chain analysis in climate dynamics

Dr. Sebastian Mieruch-Schnülle (AWI)

Im Rahmen der Klimacampus-Woche 2021 (17-22. Mai)

This guest Seminar is on the use of Markov chains for the analysis of the dynamics and succession of compound extreme events in a changing climate.

Zo... 

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14.05.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Cointeracting bialgebras on permutations and set partitions

Yannic Vargas (Univ. of Potsdam and IVIC, Caracas, Venezuela)

Pairs of cointeracting bialgebras recently appeared in the study of  combinatorial Hopf algebras based on trees (Calaque, Ebrahimi-Fard, Manchon), graphs (Manchon) and posets (Foissy). Several results... 

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12.05.2021, 13:30 Uhr  –  Zoom
Forschungsseminar Diskrete Spektraltheorie

Path homology on digraphs

Alexander Grigor'yan (University of Bielefeld)

Please contact Siegfried Beckus (beckus@uni-potsdam.de) if you are interested to join the talk.

mehr erfahren

12.05.2021, 10:00  –  Online Veranstaltung
Öffentlicher Vortrag

Worte von Frauen in der Mathematik in der Zeit von Corona

Diverse

Wir laden sie am am internationalen Tag der Frauen in der Mathematik Mittwoch 12. Mai um 10 Uhr herzlich zur Online-Präsentation des Videos Worte von Frauen in der Mathematik in der Zeit von Corona ht... 

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10.05.2021, 14:00
Forschungsseminar Wahrscheinlichkeitstheorie

Sparse inhomogeneous random graphs from a large deviation point of view

Luisa Andreis (Uni. Firenze)

Inhomogeneous  random  graphs  are  a  natural  generalization  of  the  well-known Erdös Rényi random graph, where vertices are characterized by a type and edges are independent but distributed... 

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07.05.2021, 10:15 am  –  online
SFB-Kolloquium

Likelihood-based estimation, model selection, and forecasting of integer-valued trawl processes

Almut Veraat (Imperial College London)

The class of integer-valued trawl processes has recently been introduced for modelling univariate and multivariate integer-valued time series with short or long memory.

In this talk, I will discuss... 

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07.05.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

The spectral action principle on Lorentzian scattering spaces

Viet Dang (University of Lyon)

The spectral action principle of Connes recovers the Einstein Hilbert action from spectral data and is one of the cornerstones of the noncommutative geometry approach to the standard model, yet it is... 

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30.04.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Combinatorial Hopf algebras: definition and examples

Cécile Mammez (University of Lille)

The theory of Hopf algebras, initially motivated by investigations on compact Lie groups, has been intensively studied. Many connections with areas of mathematics (algebraic combinatorics,... 

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29.04.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Weyl laws for regular realizations of elliptic operators

Magnus Goffeng (Lund University)

Using a Bär-Ballmann type machinery, one can describe all realizations of elliptic operators on manifolds with boundary. Classically, boundary value problems are phrased in terms of imposing a... 

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26.04.2021, 14:00 - 15:00
Forschungsseminar Wahrscheinlichkeitstheorie

Random connected subgraph on Zd: A phase transition result

David Dereudre (Lille, Frankreich)

We consider the bond percolation model on the lattice Zd (d≥2) with the constraint to be fully connected. Each edge is open with probability p∈(0,1), closed with probability 1−p and then the process... 

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23.04.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Locality and renormalisation in perturbative AQFT

Kasia Rejzner (University of York)

In this talk, I will give a review of how locality enters the Epstein-Glaser renormalisation scheme and report on some more recent results regarding locality and its breaking in pAQFT.

Forthcoming... 

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22.04.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Graphical decompositions for higher order boundary value problems

Lashi Bandara (UP)

The graphical decomposition for elliptic boundary conditions, obtained by Bär-Ballmann, is an important characterisation of such boundary conditions.
It allows for deformations of these boundary... 

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21.04.2021, 14:00 - 15:45  –  Online Meeting
Institutskolloquium

Dimers and diamonds: From the Aztecs to Ising via Gibbs

Béatrice De Tilière (IUF, University Paris Dauphine CEREMADE) and Sunil Chhita (Durham University)

2pm-2:45pm Béatrice De Tilière (IUF, University Paris Dauphine CEREMADE): The Z-invariant Ising model via dimers

3pm-3:45 pm Sunil Chhita (Durham University): The two-periodic Aztec diamond

Abstracts:

...  mehr erfahren

16.04.2021, 10:15 am  –  online
SFB-Kolloquium

MaRDI - The Mathematical Research Data Initiative within the NFDI

Karsten Tabelow (WIAS Berlin)

Like in all scientific disciplines research data in mathematics has become vast, it is complex and multifaceted, and, through the successful application of mathematics in interdisciplinary research,... 

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16.04.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

On the volume of generalized tubes

Annegret Burtscher (Radboud University Nijmegen)

Abstract: Consider a small spherical tube around a compact submanifold M in Euclidean space. In 1939 Weyl showed the remarkable property that the volume of such a tube only depends on the radius of... 

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15.04.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Eigenvalue estimates involving Bessel functions

Georges Habib (Lebanese University Beirut)

Given a compact Riemannian manifold \((M^n ,g)\) with smooth boundary \(\partial M\), we give an estimate for the quotient \(\frac{\int_{\partial M} f dv_g}{\int_M f dv_g}\) in terms of the Bessel... 

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12.04.2021, 18:00  –  Online-Veranstaltung
Informationsveranstaltung

Willkommensveranstaltung für neue Masterstudierende

Das Institut für Mathematik begrüßt die neuen Studierenden am Institut. Um den Einstieg zu erleichtern findet am Montag, den 12.04.2021 um 18 Uhr, eine kurze Einführungsveranstaltung in Zoom statt.... 

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30.03.2021, 16:00  –  Haus 9, 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Spin-Hall effects in General Relativity

Marius -Adrian Oancea

TERMINÄNDERUNG! Moved back from 23rd to 30th of March.

Abstract:

The propagation of test fields on a fixed Lorentzian manifold is often studied by using the geometrical optics approximation. In the... 

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25.03.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Positive scalar curvature on manifolds with odd order abelian fundamental groups

Bernhard Hanke (Augsburg)

We introduce Riemannian metrics of positive scalar curvature on manifolds with Baas-Sullivan singularities, prove a corresponding homology invariance principle and discuss admissible products. Using... 

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19.03.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Grassmann stochastic analysis

Massimiliano Gubinelli (Uni Bonn)

Another session of the Renormalisation and Geometry seminar, with a talk by Massimiliano Gubinelli (Uni Bonn).

Abstract: I will review some recent progresses in understanding the stochastic... 

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18.03.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Index theorems on non-closed manifolds

Mehran Seyedhosseini (UP)

I will talk about an index theorem of Roe for open manifolds and some of its geometric applications. Along the way, we will encounter localised analytic indices of Connes and Moscovici. I will then... 

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11.03.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Linear wave equations on the Schwarzschild black hole spacetime

Ariane Beier (UP)

The radial part of the scalar wave equation (SWE) on the Schwarzschild spacetime can be interpreted and analysed as a Sturm-Liouville problem. Considering a topological quantum number or fields of... 

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11.03.2021, 09:15  –  Campus Golm, Haus 28, Raum 0.108
Verteidigung der Dissertation / Defence of the PhD thesis

"Neue Zugänge zum Winkelbegriff"

Heiko Etzold

Titel der Dissertation:

Neue Zugänge zum Winkelbegriff.

Fachdidaktische Entwicklungforschung zur Ausbildung des Winkelfeldsbegriff bei Schülerinnen und Schülern der vierten Klassenstufe

 

Interessiert... 

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15.02. bis 19.02.2021  –  Online Meeting
Konferenz

Microlocal and Global Analysis, Interactions with Geometry

We have the pleasure to invite you to the next edition of a series of meetings initiated by Professor Schulze devoted to microlocal, singular and global analysis and their interactions with geometry... 

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12.02.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

On the pole structure of Shintani zeta functions

Diego Lopez (Uni Potsdam)

Shintani zeta functions generalize multizeta functions, and these in turn generalize the Riemann zeta function. They also relate to conical zeta functions associated with cones. In this talk,... 

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11.02.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

About the irreducible Representations of SU(3)

Jonas Rungenhagen (UP)

In this talk, I want to go over some representation theoretical background to introduce the irreducible representations of the special unitary group SU(3). This is motivated by the calculation of the... 

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11.02.2021, 14:00 Uhr  –  Zoom-Videokonferenz
Öffentlicher Vortrag

UN Tag - "Women in Science"

Eine Reise durch die Wissenschaften mit Doktorandinnen

Diese interdisziplinäre Veranstaltung zum internationalen Tag der Frauen und Mädchen in den Wissenschaften findet in 2021 im dritten Jahr statt... 

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11.02.2021, 2 pm  –  Zoom Video Conference
Öffentlicher Vortrag

International Day - "Women in Science"

A journey through the sciences with female PhD students

For this third edition (this time online) at the University of Potsdam of the International Day of Women and Girls in Science 2021 seven female... 

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10.02.2021, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

Threshold Ornstein-Uhlenbeck process: drift parameters estimation

Dr. Sara Mazzonetto

With the term threshold diffusion we denote diffusion processes which follow different dynamics in different space intervals. We focus on the one-dimensional case of two Ornstein-Uhlenbeck dynamics in... 

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05.02.2021, 11:15  –  Online Meeting
Arbeitsgruppenseminar Analysis

Some questions about renormalisation

Lorenzo Zambotti (Sorbonne University, Paris)

Another session of the Renormalisation and Geometry seminar, with a talk by Lorenzo Zambotti (Sorbonne University, Paris).

Abstract: In this informal talk I would like to explain briefly how I came in... 

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04.02.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Relative Traces in Obstacle Scattering

Florian Hanisch (UP)

In obstacle scattering, one is interested in properties of the Laplacian
∆ on the complement of a compact set O ("the obstacles") in Euclidean
space. It may be compared with the free Laplacian ∆₀  and... 

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03.02. bis 01.02.2021, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

Generalized non-stationary multi-armed Bandits

Anne Manegueu (Magdeburg)

Recent decades have seen rapid advances in multi-armed bandits (MAB) algorithms, due to their ability to optimize with the presence of uncertainty. Classical MAB problems are studied based on the... 

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29.01.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Evaluating germs at poles and locality

Sylvie Paycha (Uni Potsdam)

How to evaluate  meromorphic germs at their poles while preserving a locality principle reminiscent of locality in QFT is a question that lies at the heart of  pQFT. It further  arises in other... 

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28.01.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Center of mass in general relativity

Alejandro Peñuela Diaz (UP)

We will see different approaches to the problem of defining a center of mass of a system in general relativity, specifically in the setting of the initial value formulation of general relativity. We... 

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27.01.2021, 14:00 - 15:45  –  Online Meeting
Institutskolloquium

Evolution of probability densities in complex systems

Michela Ottobre (Heriot-Watt University) and Carsten Hartmann (BTU Cottbus-Senftenberg)

2pm-2:45pm Michela Ottobre (Heriot-Watt University): Non-mean-field interacting particle systems

3pm-3:45 pm Carsten Hartmann (BTU Cottbus-Senftenberg): Optimal control of the underdamped Langevin... 

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27.01.2021, 13:00-13:30
Forschungsseminar Wahrscheinlichkeitstheorie

Wilcoxon-Test: Ein Rangtest für zwei unverbundene Stichproben

Angelina Henning (UP)

In diesem Vortrag wird das Testverfahren von Wilcoxon betrachtet, welches eine Alternative zum 2-SP-t-Test liefern kann. Dieses Verfahren gehört zu den sogenannten Rangtests. Neben der theoretischen... 

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22.01.2021, 10:15  –  online
SFB-Seminar

Global sensitivity analysis in environmental modeling

Kim Aleksandra, ETH Zürich and Paul Scherrer Institute (Switzerland)

In today’s complex world and economy, international supply chains of goods cause global environmental impacts. Life Cycle Assessment (LCA) is a well established tool used for quantification of product... 

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22.01.2021, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Exponential renormalisation

Kurusch Ebrahimi Fard (University of Trondheim)

Next talk in the monthly (online) seminar Renormalisation and Geometry organised jointly with friends and colleagues from various countries in Europe

Titel: Exponential renormalisation
Abstract: We... 

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21.01.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Splitting of the Jacobi operator for extremal submanifolds with higher codimension

Claudia Grabs (UP)

We consider a Riemannian manifold with an embedded submanifold, which is extremal for some energy functional. For these embeddings, we compare the Jacobi operators corresponding to the different... 

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20.01.2021, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

Concentration inequalities for dependent random fields

Oleksandr Zadorozhnyi (Uni Potsdam)

In this talk I firstly discuss a general martingale-difference approach which can be used to obtain some of the existing concentration inequalities for 1-dimensional weakly-dependent random processes.... 

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15.01.2021, 15:00  –  online - cancelled
SFB-Kolloquium

Kayo Ide

Cancelled - Kayo Ide (University of Maryland, US)

Unfortunately we had to cancel this Colloquium and will continue with our series in the new term.

mehr erfahren

15.01.2021, 11:00  –  Online Meeting
Arbeitsgruppenseminar Analysis

Dirac's 3-form formulation of gauge theory

Chand Devchand (University of Potsdam)

It is well-known that gauge theories in four-dimensional space time are conformally invariant. However, for the field equations, as they are usually written, only the Lorentz invariance is manifest.
... 

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14.01.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

First order differential operators on spacetimes with timelike boundary

Penelope Gehring (UP)

Boundary value problems for elliptic first order differential operators on Riemannian manifolds are rather well understood. Recently, Bär-Strohmaier introduced APS-conditions for the Dirac operator on... 

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13.01.2021, 14:00  –  Online Meeting
Institutskolloquium

Entanglement of graphs and networks

Sonja Berthel (Vrije Universitet, Amsterdam) and Myfawny Evans (University of Potsdam)

If you wish to attend the talks,  please contact Sylvie Paycha paycha@math.uni-potsdam.de for the login details.

2pm-2:45pm Sonja Berthel (Vrije Universitet, Amsterdam): Entanglements in (molecular)... 

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13.01.2021, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

Stochastic optimal control of SDEs for importance sampling of path functional

Han Cheng Lie (University of Potsdam)

The estimation of statistics of functionals of a diffusion process is a problem that arises in multiple applications. An example of such a problem involves estimating the expected value of the first... 

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08.01.2021, 11:00  –  Online Meeting
Arbeitsgruppenseminar Analysis

Linear generalised complex structures

Malte Heuer (University of Hamburg)

Generalised complex structures were introduced by Nigel Hitchin and studied by Marco Gualtieri as a unification of complex and symplectic structures. In this talk I will first recall basic definitions... 

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07.01.2021, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Geometric Inverse Problems in Gauge Theory

Chen Xi (Cambridge, UK)

The fundamental interactions of elementary particles are described by the Euler-Lagrange equations in the Standard Model of particle physics. The Yang-Mills equation addresses the electroweak and... 

mehr erfahren

06.01.2021, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

Mastering the Maze - Reinforcement Learning in Grid-World-Setup

Peter Keller

Imagine, a robot is moving through a maze that consists of equal sized rooms. Adjacent rooms are connected by doors. The robot can now perform actions, choosing the next door with respect to a given... 

mehr erfahren

17.12.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

L^p-stability and positive scalar curvature rigidity of Ricci-flat ALE manifolds

Klaus Kröncke (Tübingen)

We prove stability of integrable ALE manifolds with a parallel spinor under Ricci flow, given an initial metric which is close in \(L^p\cap L^{\infty}\), for any \(p \in (1, n)\), where n is the... 

mehr erfahren

16.12.2020, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

An explicit uniqueness region for Gibbs point processes

Alexander Zass (Potsdam)

We present a uniqueness result for Gibbs point processes with repulsive pair interaction; in particular, we provide an explicit uniqueness region in terms of the activity and inverse temperature... 

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11.12.2020, 10:00  –  online
SFB-Kolloquium

Bayesian nonparametric estimation in multivariate non linear Hawkes processes

Judith Rousseau (University of Oxford, UK)

tba

mehr erfahren

11.12.2020, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Higher gauge theory

Branislav Jurco (Charles University in Prague)

Abstract: This will be a leisurely introduction, from first principles, to higher gauge theory with higher groupoids as gauge structures. As a model for higher (Lie) groupoids we will use Kan... 

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10.12.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Long-time estimates for heat flows on ALE manifolds

Oliver Lindblad Petersen (Stanford)

We consider the heat equation associated to Schrödinger operators acting on vector bundles on asymptotically locally Euclidean (ALE) manifolds. Assuming that the Schrödinger operator can be written as... 

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09.12.2020, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

Minimax optimal goodness-of-fit testing under local differential privacy

Joseph Lam (Magdeburg)

The consequences of local differential privacy constraints on goodness-of-fit testing are considered, i.e. the statistical problem assessing whether sample points are generated from a fixed density or... 

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08.12.2020, 13:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Monodromy and Holonomy groupoid for singular foliations

Alfonso Garmendia (University of Postdam)

The next talk in the series of online seminars "At the confluence of Geometry, Analysis and Mathematical Physics" together with our colleagues from Beirut.

Title: Monodromy and Holonomy groupoid for... 

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04.12.2020, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Noncommutative localization in smooth deformation quantization

Hamilton Araujo (University of Haute Alsace in Mulhouse)

This talk consists of a discussion around the analytical localization of the algebras of functions in deformation quantization (a theory that uses algebraic deformation to quantify the algebras of... 

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03.12.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Boundary Value Problems for the Lorentzian Dirac operator

Sebastian Hannes (UP)

I'm going to briefly explain the main problems and results of my thesis and then focus on discussing some examples to show how these results apply, where they they can be extended, and also where they... 

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02.12.2020, 13:00
Forschungsseminar Wahrscheinlichkeitstheorie

Consensus Dynamics and Exclusion processes

Jens Fischer (Potsdam/Toulouse)

The voter model and the Deffuant model are two well known models on networks where individual opinions influence the relationsship dynamics. Recent work related to social networks focuses entirely on... 

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02.12.2020, 16:30  –  Online Ph.D. Seminar

What are Optimal Hardy Inequalities?

Florian Fischer

I will give an overview of recent developments in the study of Hardy-type inequalities on manifolds and on graphs. In particular, I will present a technique to get 'as large as possible' Hardy weights... 

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27.11.2020, 15:00  –  online
SFB-Kolloquium

Joint Colloquium of SFB 1287 and SFB 1294 with Nikolaus Kriegeskorte

Nikolaus Kriegeskorte (Zuckerman Institute, Columbia University New York)

Cognitive computational neuroscience of vision

To learn how cognition is implemented in the brain, we must build computational models that can perform cognitive tasks, and test such models with brain... 

mehr erfahren

27.11.2020, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Causality in quantum theory and beyond

Michał Eckstein (University of Gdansk)

It is a pleasure to announce the first talk of the monthly (online) seminar: Mathematics emerging from the Quantum, and beyond: where Renormalisation meets Geometry

organised jointly with friends and... 

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26.11.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Functorial construction of functional spaces on vector bundles

Rubens Longhi (UP)

A suitable category of vector bundles will be introduced, in which every object is obtained as a limit of trivial vector bundles. Then, a functorial definition for general functional spaces will be... 

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26.11. bis 26.11.2020, 10:30  –  Online Seminar
Arbeitsgruppenseminar Analysis

Moment maps in (multi)symplectic geometry: an introduction

Leyli Mammadova (University of Leuven)

Moment maps in (multi)symplectic geometry: an introduction

The purpose of the talk is to give an audience-friendly introduction to the concept of moment map in multisymplectic geometry. The talk will... 

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25.11.2020, 14:00  –  Online Meeting
Institutskolloquium

Through the looking-glass: a walk in the land of Fusion Categories

Ana Ros Camacho (Cardiff University, Wales), Yiby Morales (Universidad de Los Andes, Bogotá, Colombia))

If you wish to attend the talks,  please contact Sylvie Paycha paycha@math.uni-potsdam.de for the login details.

14:00 Ana Ros Camacho (Cardiff University, Wales): A gentle introduction to fusion... 

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25.11.2020, 12:00-13:30
SFB-Seminar

Mini Seminar Series on „Non-Gaussian large scale Bayesian inversion“

jointly organised by Jana de Wiljes and the Lappeenranta-Lahti University of Technology (LUT, Finland)

Mini Seminar Series Schedule

12:00-12:30 Jarkko Suuronen (LUT) - tba

12:30-13:00 Sahani Pathiraja... 

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20.11.2020, 10:00  –  online
SFB-Kolloquium

Posterior consistency in Bayesian inference with exponential priors

Masoumeh Dashti (University of Sussex, UK)

 

We consider the problem of recovering the underlying truth in a nonparametric Bayesian inference setting with p-exponential priors. These priors are a class of infinite dimensional product measures... 

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20.11.2020, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Regularised traces and Getzler’s rescaling

Sylvie Paycha (Uni Potsdam)

Inspired by Gilkey's invariance theory,  Connes' deformation to the normal cone and Getzler's rescaling method, we single out a class of geometric operators among pseudodifferential operators acting... 

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13.11.2020, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Analytic torsion for manifolds with boundary

Ihsane Malass (Uni Potsdam)

The well-known  independence on the metric of the analytic torsion on a boundaryless manifolds was discussed in the case of a manifold with boundary by various mathematicians among whom Cheeger,... 

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06.11.2020, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

Instantons with a Nahm pole at infinity

Marco Usula (KU Leuven, Université Libre de Bruxelles)

The Nahm pole boundary condition was introduced by Mazzeo and Witten in order to study an elliptic boundary problem for solutions of the Kapustin--WItten equation, a complex version of the classical... 

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30.10.2020, 11:00  –  Online Seminar
Arbeitsgruppenseminar Analysis

2-Gauge transformations: A cabinet of curiosities

Alfonso Garmendia (Uni Potsdam)

Gauge transformations  are present both in Mathematics and Physics where  they play a key role in  field  theory. In mathematical terms, these transformations are special maps on a principal bundle  ... 

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29.10.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

On the Cauchy problem for symmetric hyperbolic systems on globally hyperbolic manifolds with timelike boundary

Simone Murro

The well-posedness of the Cauchy problem for symmetric hyperbolic systems on a Lorentzian manifold is a classical problem that has been thoroughly studied in many contexts. Particularly, if the... 

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23.10.2020, 11:00  –  Online Meeting
Arbeitsgruppenseminar Analysis

From complementations on lattices to locality

Sylvie Paycha (University of Potsdam)

The first talk of the fall semester starts with Sylvie Paycha speaking about "From complementations on lattices to locality".

Abstract. A complementation proves useful to separate divergent terms... 

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15.10.2020, 09:15  –  Campus Golm, Haus 9, Raum 0.12
Verteidigung der Masterarbeit / Defence of the Master's thesis

Introduction to the Glauber Dynamics for the Curie-Weiss Potts Model

Paul Tschisgale

Abstract: In this talk we present Glauber dynamics as a way of simulating configurations according to the Gibbs distribution of the Curie-Weiss Potts model . In particular, we first present essential... 

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12.10. bis 16.10.2020  –  online
Konferenz

Higher Structures Emerging from Renormalisation

The  international meeting

  Higher Structures Emerging from Renormalisation

               https://www.esi.ac.at/events/e375

which will take place online due to the Covid-19 pandemic, aims to... 

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01.10. bis 02.10.2020  –  University Duisburg Essen
Forschungsseminar

Virtual Workshop for Young Researchers on Singular foliations and related subject

Alfonso Garmendia, Leonid Ryvkin

The idea of the workshop is to bring together young researchers from the field of singular foliations and related topics. The workshop will take place online over zoom in two sessions.

Link to the... 

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24.09.2020, 14:00  –  Zoom-Meeting
Verteidigung der Masterarbeit / Defence of the Master's thesis

Die isoperimetrische Ungleichung und ihre Verallgemeinerungen

Karsten Hansch

Interessenten schreiben für die Zoom-Zugangsdaten bitte eine E-Mail an cbaer@uni-potsdam.de

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24.09. bis 25.09.2020  –  online
Konferenz

GAMM Workshop Applied and Numerical Linear Algebra 2020

The 20th Workshop of the GAMM Activity Group on Applied and Numerical Linear Algebra will take place online via zoom in a reduced format from 24th-25th September 2020. There will be plenary talks by

D... 

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18.09.2020, online  –  University of Potsdam
Institutsveranstaltung

A scientific tribute to Prof. Nikolai Tarkhanov

Nikolai Tarkhanov

23.03.1956-31.08.2020

 

Nikolai Tarkhanov, who passed away on July 31st, was an enthusiastic teacher, a generous and learned man, behind whose modesty there was an outstanding... 

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07.09.2020, 10:15  –  online via zoom
SFB-Kolloquium

3rd Kálmán Lecture mit Sara van de Geer (ETH Zürich)

Sara van de Geer (ETH Zürich)

The Lasso revisited: entropy bounds and dual certificates

The Lasso is least squares estimation with an ℓ1-penalty on the coeffcients. In this talk we consider the case where the design matrix is... 

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23.07. bis 23.07.2020, 16:00  –  Zoom meeting
Arbeitsgruppenseminar Analysis

The Cesàro expansion of the Spectral Action

Juan Daniel Lopez Castano (Universidad Nacional de Colombia)

The spectral action is the natural and appropriate notion of action on the space of spectral triples, introduced by Chamseddine and Connes in [CC97] and defined as follows: given a spectral triple (A,... 

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17.07.2020, 10:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Example of Baum-Connes isomorphism for the pure braid group on four strands

Sara Azzali (Hamburg University)

The Baum--Connes conjecture predicts an isomorphism between two objects associated with a discrete countable group. The first one is topological in nature and involves a classifying space for proper... 

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16.07.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

A relative Cheeger-Gromov rho-invariant and the space of positive scalar curvature metrics on manifolds with boundary

Mehran Seyedhosseini

Secondary invariants associated to positive scalar curvature metrics on closed spin manifolds have been used to study the space of such metrics on a fixed manifold. I will first talk about a result of... 

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16.07.2020, 15:30  –  Webinar
Forschungsseminar Wahrscheinlichkeitstheorie

Modelization of Covid 19 by multitype branching processes

Andrea Hübner

Master thesis

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15.07.2020, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

Holomorphic maps on complex manifolds: two perspectives

Florian Bertrand (American University of Beirut), Francine Meylan (Uni Freiburg)

If you wish to attend the talks,  please contact Sylvie Paycha paycha@math.uni-potsdam.de for the login details.

14:00 Florian Bertrand (American University of Beirut) : Analytic discs in Complex... 

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10.07.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Singular Hölder spaces and applications

Carlo Bellingeri (TU Berlin)

We introduce the class of singular Hölder paths, singular controlled rough paths and singular rough paths. These spaces arise naturally from the context of regularity structures and they can be used... 

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09.07.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

A long neck principle for Riemannian spin manifolds with positive scalar curvature

Simone Cecchini (Göttingen)

We develop index theory on compact Riemannian spin manifolds with boundary in the case when the topological information is encoded by bundles which are supported away from the boundary. As a first... 

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03.07.2020, 11:00
Arbeitsgruppenseminar Analysis

Locality structures: vector spaces and lattices

Pierre Clavier (Uni Potsdam)

Given a locality (ie binary symmetric) relation T on a vector space V, it is in general difficult to decide if (V,T) is a locality vector space, that is to say if T respects the linear structure of V... 

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02.07.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Spectral theory on stationary spacetimes

Alexander Strohmaier (Leeds)

For compact Riemannian manifolds the Gutzwiller-Duistermaat-Guillemin trace formula is one of the standard tools to show Weyl laws, investigate questions of quantum chaos, and prove inverse spectral... 

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26.06.2020, 11:00  –  Zoom meeting
Arbeitsgruppenseminar Analysis

Renormalization of gauge theories

Henry Kißler (HU Berlin)

Last term, Alfonso and Pierre have been talking about gauge theories and I'd like to add some aspects about renormalization to the discussion. Due to quantisation, singular integrals arise; curing... 

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25.06.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Self-adjoint codimension 2 boundary conditions for Dirac operators

Bernd Ammann (Regensburg)

Let N be an oriented compact submanifold of codimension 2 in an oriented complete Riemannian manifold M. We assume that M\N is spin and carries a unitary line bundle L. We study the self-adjoint... 

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22.06.2020, 12:15  –  Webinar
Forschungsseminar Wahrscheinlichkeitstheorie

Sequential prediction for arbitrary time-series

Pierre Gaillard (INRIA Paris)

In this presentation we will examine the framework for online prediction of arbitrary time series. In the latter, a learner sequentially makes predictions of a time series, for which no stochastic... 

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19.06.2020, 11:00  –  Zoom meeting
Arbeitsgruppenseminar Analysis

Quantum groups and K-theory

Roland Vergnioux (Uni-Caen)

I will start by presenting the theory of compact/discrete quantum groups and in particular the so-called "free quantum groups". Then I will explain how the Baum-Connes conjecture can be adapted to... 

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18.06.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

The KO-valued spectral flow for skew-adjoint Fredholm operators

Matthias Lesch (Bonn)

We give a comprehensive treatment of a ‘Clifford module flow’ along paths in the skew-adjoint Fredholm operators on a real Hilbert space that takes values in KO(R) via the Clifford index of... 

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17.06.2020, 14:00  –  Zoom meeting
Institutskolloquium

Examples of random graphs in hyperbolic geometry

Dieter Mitsche (University of Lyon 1), David Coupier (University of Valenciennes)

If you wish to attend the talks,  please contact Sylvie Paycha paycha@math.uni-potsdam.de for the login details.

Please note that the second talk has been advanced by 15 min to 3:15pm!

14:00 Dieter... 

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12.06.2020, 10:15  –  online
SFB-Kolloquium

Digital first, concerns second: Our power to change everyday life and the question of responsibility in algorithm development

Ulrike Lucke (UP) and Ina Müller (UP)

Developers of IT systems have enormous power. - And therefore also a great responsibility. This applies especially to the ideas and concepts about the social domain, which are inscribed in the... 

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12.06.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Mellin transform of multivariate rational functions

Diego Andrés López Valencia (Potsdam University)

The Mellin transform is very useful when studying meromorphic continuations of different types of zeta functions, however it is not always easy to calculate. In this talk I will introduce and... 

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11.06.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

On the evolution of hypersurfaces along their inverse spacetime mean curvature

Markus Wolff (Tübingen)

We introduce a new inverse curvature flow on asymptotically flat Initial Data sets (M,g,K). In General Relativity, such a triple (M,g,K) arises naturally as a spacelike hypersurface of a Lorentzian... 

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08.06.2020, 12:20  –  Webinar
Forschungsseminar Wahrscheinlichkeitstheorie

Metastability in the Curie-Weiss and randomly dilute Curie-Weiss models

Saeda Marello (Bonn)

The Curie-Weiss model (CW) is a classical model of a ferromagnetic spin system in which all spins interact with each other. After giving an introduction on metastability, a phenomenon appearing in a... 

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08.06.2020, 11:45  –  Webinar
Forschungsseminar Wahrscheinlichkeitstheorie

The (neural network) Hopfield Model applied to decision making in behavioural science

Anne Flöge (Potsdam)

TBA

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05.06.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Algebraic structures on noncrossing partitions

Loïc Foissy (ULCO)

The theory of free probabilities uses the combinatorics of noncrossing partitions in order, for example to establish relations between free cumulants and moments of a random variable. We shall... 

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04.06.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Functional spaces on manifolds and vector bundles

Rubens Longhi

I will construct the space of distributional sections of general vector bundles and give a general definition for local and compactly supported functional spaces.

Access data at: https://moodle2.uni-p... 

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03.06.2020, 11:00
Arbeitsgruppenseminar Analysis

From gauges to gaugeoids: connections and transformations II

Sylvie Paycha (Potsdam University)

Two essential ingredients in classical gauge field theory are  gauge fields given by  connections on a principal bundle  and gauge transformations given by automorphisms of the bundle.

Principal... 

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29.05.2020, 10:15
SFB-Kolloquium

Statistical properties of deterministic dynamical systems and their applications in weather and climate forecasting

Georg Gottwald (University of Sydney, Australia)

The talk is concerned with recent results on statistical properties of deterministic dynamical systems. We will discuss the problem of finding diffusive limits in multi-scale systems. Homogenization... 

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29.05.2020, 11:00
Arbeitsgruppenseminar Analysis

From gauges to gaugeoids: connections and transformations

Sylvie Paycha (Potsdam University)

Two essential ingredients in classical gauge field theory are  gauge fields given by  connections on a principal bundle  and gauge transformations given by automorphisms of the bundle.

Principal... 

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28.05.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Minimal surfaces, periodic tangling and wrinkly skin

Myfanwy Evans

This talk will introduce the use of geometric ideas in the characterisation and analysis of biophysical systems. Triply-periodic minimal surfaces and their occurrences in nature will provide the... 

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22.05. bis 23.06.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

The bar-cobar construction

Pierre Clavier (Uni Potsdam)

The bar-cobar construction a pair of adjoint functors between the categories of differential graded associative algebras and codifferential cograded coalgebras. In this pedagogical introduction, I... 

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15.05.2020, 14:00  –  Auditorium Maximum, Haus 8, Am Neuen Palais
Öffentlicher Vortrag

Euler-Vorlesung 2020

Fernando Codá Marques

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15.05.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Renormalization of determinant lines in Quantum Field Theory

Viet Dang Nguyen (Université Lyon 1)

In the present talk, we will discuss how we understand a three page note from Quillen's notebook where he tries to make sense of the technique of "adding counterterms to the Lagrangian to remove the... 

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14.05.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Manifolds with many Rarita-Schwinger fields

Christian Bär

The Rarita-Schwinger operator is the twisted Dirac operator restricted to 3/2-spinors. Rarita-Schwinger fields are solutions of this operator which are in addition divergence-free. This is an... 

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13.05.2020, 14:00  –  Zoom meeting
Institutskolloquium

From dynamics to rigidity

Nguyen Viet Dang (University Claude Bernard, Lyon 1) und Colin Guillarmou (University Paris XI)

If you wish to attend the talks,  please contact Sylvie Paycha paycha@math.uni-potsdam.de for the login details.

14:00 Nguyen Viet Dang (University Claude Bernard, Lyon 1): Dynamical systems: spectral... 

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08.05.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Locality tensor products and universal properties

Diego Andrés López Valencia (Potsdam University)

In the context of locality, there is a generalization of the usual tensor product which is expected to remain in the category of locality vector spaces, however this is still an open problem. In this... 

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06.05.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Areas of areas generate the shuffle algebra (Part II)

Rosa Preiß (TU Berlin)

We consider the anti-symmetrization of the half-shuffle on words, which we callthe area operator, since it corresponds to taking the signed area of elements of the iterated-integral signature. The... 

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30.04.2020, 16:15  –  Online-Seminar
Forschungsseminar Differentialgeometrie

Scalar positive immersions

Bernhard Hanke (Augsburg)

As shown by Gromov-Lawson and Stolz the only obstruction to the existence of positive scalar curvature metrics on closed simply connected manifolds in dimensions at least five appears on spin... 

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29.04.2020, 11:00  –  Zoom meeting
Arbeitsgruppenseminar Analysis

Areas of areas generate the shuffle algebra

Rosa Preiß (TU Berlin)

We consider the anti-symmetrization of the half-shuffle on words, which we callthe area operator, since it corresponds to taking the signed area of elements of the iterated-integral signature. The... 

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29.04.2020, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

ENTFÄLLT

David Damanik (Rice University, Houston), Marko Lindner (Technische Universität Hamburg)

Spectral Theory, Dynamical Systems, Aperiodic Order

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24.04.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Free Wick polynomials

Nikolas Tapia (TU Berlin and WIAS)

Solutions to the Dyson-Schwinger equation can be obtained by inverting the normal ordering operator. This operator is related to Wick polynomials of annihilation and creation operators. In this talk I... 

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23.04.2020, 16:15  –  Online Seminar
Forschungsseminar Differentialgeometrie

Horizons in general relativity

Oliver Lindblad Petersen (Stanford)

Moncrief and Isenberg conjectured in 1983 that any compact Cauchy horizon in a smooth vacuum spacetime is a smooth Killing horizon. We present a proof of this conjecture, under the assumption that the... 

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17.04.2020, 11:00  –  Zoom Meeting
Arbeitsgruppenseminar Analysis

Rigging Technique for 1-Lightlike Submanifolds

Hans Fotsing (African Institute for Mathematical Sciences, Cameroon)

We will discuss riggings on a 1-lightlike  submanifold, which  have many of the good properties of the Gauss map of non degenerate hypersurfaces. We will also show that for the case of the (n+... 

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06.04.2020, 14:00  –  Virtual meeting via zoom, see link below
Verteidigung der Masterarbeit / Defence of the Master's thesis

Characteristic classes in computer algeba

Michael Jung

Link to virtual meeting room: https://us04web.zoom.us/j/908168941?pwd=VGs0Z2FPM1Fza1FEbVQzNFJxelUzQT09

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26.03.2020, 9:45 bis 15:15  –  Campus Golm
Schülerförderung

[entfällt] Zukunftstag

Aufgrund der derzeitigen Corona-Situation muss der Zukunftstag am 26.3. an der Universität Potsdam leider entfallen. Ein Ersatztermin im Herbst wird geprüft – Informationen dazu folgen zu... 
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13.03. bis 13.03.2020, 11:00  –  Raum 2.22
Seminar "Topics in Geometric Analysis"

Some details of the proof of the Positive-Mass Theorem in higher dimensions

Simon Hirscher

Since its release on the arXiv in 2017, the (so far unpublished) proof of the higher-dimensional Positive-Mass Theorem by Schoen & Yau has become notorious for being rather difficult to understand,... 

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12.03.2020, 14:15 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Minimizers of Generalized Willmore Functionals and Applications in General Relativity

Alexander Friedrich

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28.02.2020, 10:15-11:15  –  Haus 9, Raum 0.13
SFB-Seminar

Relaxation techniques for PDE-constrained optimization in inverse problems

Tristan van Leeuwen (Universiteit Utrecht, The Netherlands)

PDE-constrained optimization problems arise in many applications, including inverse problems and optimal control. As optimization over both the control and state parameters is not feasible for... 

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26.02. bis 26.02.2020, 12:30  –  Campus Golm, Haus 9, Raum 2.09.2.22
Forschungsseminar Diskrete Spektraltheorie

Harmonic Functions on Graphs with Group Actions

Matti Richter

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26.02.2020, 10:15-11:15  –  Haus 9, Raum 0.13
SFB-Seminar

Multilevel ensemble Kalman filtering algorithms

Hakon Hoel (RWTH Aachen)

The ensemble Kalman filter (EnKF) is a Monte-Carlo-based sequential filtering method that is often both robust and efficient, but its performance may suffer in settings where the computational cost of... 

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25.02.2020, 13:00-14:00  –  Haus 9, Raum 0.12
SFB-Seminar

Contaminant dispersal, numerical simulation, and stochastic PDEs

Tony Shardlow (University of Bath)

Atmospheric dispersal of contaminants such as ash can be modelled by stochastic differential equations coupled to a large-scale weather model. We develop this model as used by the UK Met Office and... 

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25.02.2020, 14:00  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

An approach for geometric counterexamples for the ​​​​​​H^\infty calculus

Lashi Bandara

mehr erfahren

20.02.2020, 8:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

GAMP 2020 Workshop: At the confluence of Geometry Analysis and Mathematical Physics

Diverse

GAMP 2020 Workshop

we are pleased to invite you to the first workshop of the Germano-Lebanese project ``At the confluence of Geometry Analysis and Mathematical Physics'' in collaboration with the... 

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14.02.2020, 11:00-12:00  –  Haus 9, Raum 0.13
SFB-Seminar

Statistics for chaotic dynamics and random patterns

Heikki Haario, LUT University (Technische Universität Lappeenranta), Finland

We discuss methods for creating Gaussian likelihoods for data that does not directly follow any known statistics. Obvious summary statistics are available, such as averages, but they turn out to lose... 

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14.02.2020, 10:00-11:00  –  Haus 9, Raum 0.13
SFB-Seminar

Posterior Inference for Sparse Hierarchical Non-stationary Models

Lassi Roininen, University of Oulu, Finland

Gaussian processes are valuable tools for non-parametric modelling, where typically an assumption of stationarity is employed. While removing this assumption can improve prediction, fitting such... 

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11.02.2020, 14:00 Uhr  –  Campus Golm, Haus 28, Raum 0.108
Öffentlicher Vortrag

Naturwissenschaftlerinnen werden vorgestellt

Am internationalen Tag der Frauen und Mädchen in den Wissenschaften soll diese interdisziplinäre Veranstaltung dazu beitragen, Frauen in den Naturwissenschaften sichtbarer zu machen. Zu diesem Zweck... 

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11.02.2020, 16:30-17:00  –  Haus 9, Raum 2.22

Boundary Regularity for Elliptic Partial Differential Equations

Philipp Bartmann

The behaviour of solutions to elliptic PDE's at the boundary of a domain $\Omega$ depends heavily on the geometry of $\partial\Omega$. One is therefore interested in criteria to $\Omega$ that ensure... 

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10.02. bis 14.02.2020  –  Campus Neues Palais, Building 9, 1.02
Konferenz

Microlocal and global analysis in geometry and mathematical physics

We have the pleasure to invite you to the next edition of a series of meetings initiated by Professor Schulze devoted to microlocal, singular and global analysis and their interactions with geometry... 

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07.02.2020, 14:15  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Nodal Domains and Boundary Representation for Dirichlet Forms

Michael Schwarz

mehr erfahren

06.02.2020, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Das Nadel-Problem von Buffon

Josephine Bommer

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 27

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05.02.2020, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

A mathematical perspective on solid state physics: localisation and ergodicity

Peter Müller (Ludwig-Maximilians-Universität München), Felix Pogorzelski (Universität Leipzig)

14:00 Peter Müller (Ludwig-Maximilians-Universität München): Localisation for Delone operators: results from wonderland and beyond

15:00 Tea and Coffee Break

15:30 Felix Pogorzelski (Universität... 

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04.02.2020, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Geometry of minimal elastic energy surfaces with SageManifolds

Claudia Grabs

We show how to compute minimal elastic energy surfaces for rotationally symmetric deformations of annulus shaped reference configurations. The computations are done with the SageManifolds extension of... 

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04.02.2020, 16:15-18:45  –  Universität Potsdam, 2.09.2.22
Seminar "Topics in Geometric Analysis"

Topics in Geometric Analysis

Tobias Lamm, Tristan Rivière

16:15

Tobias Lamm

(KIT Karlsruhe)

Limits of α-harmonic maps

In a famous paper, Sacks and Uhlenbeck introduced a perturbation of the Dirichlet energy, the so-called α-energy Eαα>... 

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03.02.2020, 16:00  –  Haus 9, Raum 2.22
Oberseminar Analysis, Geometrie, Physik

The Prime Number Theorem

Sylvie Paycha

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03.02.2020, 14:15-15:15  –  TU Berlin Mathematikgebäude Raum MA748
SFB-Seminar

Implicit equation-free methods applied on noisy slow-fast systems

Anna Dittus, Universität Rostock

Slow-fast systems consist of slow macroscopic and fast microscopic dynamics. By using equation-free methods, one can do a complete bifurcation analysis of these slow macroscopic variables, even if... 

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31.01.2020, 10:15-11:15  –  Campus Golm, Haus 26, Raum 0.76
SFB-Seminar

Data-driven reconstruction of chaotic dynamics using data assimilation and machine learning

Marc Bocquet (École des Ponts ParisTech)

Recent progress in machine learning has shown how to forecast and, to some extent, learn the dynamics of a model from observations, resorting in particular to residual neural networks. These... 

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30.01.2020, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Das endliche Kakeya-Problem

Benjamin Baron

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 35

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29.01.2020, 16:15  –  Campus Golm, Haus 9, Raum 2.22

Weyl Asymptotics for Difference Operators and Statistical Mechanics

Enrico Reiß

The physically motivated quantization procedure generates an operator (the so-called pseudo-differential operator, PDO) from a function on the phase space $$\mathbb{R}^n \times \mathbb{R}^n$$ (the... 

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28.01.2020, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Representations of Compact Lie Groups

Jonas Rungenhagen

In this talk, I want to give an overview about the representation theory of compact Lie groups as it has various applications.

mehr erfahren

27.01.2020, 15:00  –  Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 14, Raum 2.14.0.12
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Embodied Movement in Mathematics Education

Prof. Arthur Bakker (Freudenthal-Institut, Niederlande)

Can moving the body have added value in learning mathematics? Much research on embodied cognition suggests that cognition is distributed across brain, body, tools, environment, and culture. Far less... 

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27.01.2020, 16:15  –  Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 14, Raum 2.14.0.12
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Measurement as relational, intensive and inclusive

Prof. Nathalie Sinclair (Simon-Fraser-University, Canada)

To measure is at once a practical and a conceptual engagement with the world. At its most basic, measuring involves empirical encounters (broadly conceived) that allow one to assign various... 

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27.01.2020, 12:15  –  Campus Golm Haus 9 Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

On the maximum of a perturbed random walk

Andrey Pilipenko (Kyiv)

Abstract. Let \((\xi_1,\eta_1), (\xi_2,\eta_2),\ldots\) be asequence of i.i.d. two-dimensional random vectors. We prove a functional limit theorem for the maximum of a perturbed random walk \(\underse... 

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27.01.2020, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

Complex Dynamics: The Fatou-Julia-Baker Theorem II

Christian Bär

mehr erfahren

24.01.2020, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Machine Learning for Enhanced Mobility

Katharina Morik (TU Dortmund)

Mobility is an important topic, because on the one hand, the global world requires mobility of people and goods, but on the other hand, we suffer from traffic jams and pollution. This broad field... 

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23.01.2020, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Zerlegung von Rechtecken

Nazli Mammadova

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 29

mehr erfahren

22.01. bis 22.01.2020, 12:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.0.14
Forschungsseminar Diskrete Spektraltheorie

Quantitative estimates between the spectra of Schrödinger operators

Dr. Siegfried Beckus (Universität Potsdam)

mehr erfahren

22.01.2020, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

21.01.2020, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Edge-following topological states

Matthias Ludewig (Adelaide)

Recently, physicists have been able to create “topological states” localised on the boundary of a 2D system, which have rather crazy properties: they fill up spectral gaps in the boundary-less 2D... 

mehr erfahren

21.01.2020, 13:00  –  Campus Golm, Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Introduction to invariant metrics

Florian Bertrand (Beirut)

In this talk, I will survey some of the classical biholomoprhically invariant metrics defined on domains in the complex Euclidean space. These metrics and related objects are particularly adapted to... 

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20.01.2020, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

Complex Dynamics: The Fatou-Julia-Baker Theorem

Christian Bär

mehr erfahren

20.01.2020, 12:15  –  Campus Golm Haus 9 Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Stochastic dependent bandits with memory

Oleksandr Zadorozhnyi (Potsdam)

In the talk I present the stochastic multi-armed bandit problem and its analysis in the case when the arm samples are dependent over time and generated from the so-called weak \(\mathcal{C}\)-mixing... 

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16.01.2020, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Die Borsuk-Vermutung

Martin Botushev

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 18

mehr erfahren

15.01. bis 17.01.2020  –  Universität Potsdam, 2.14.0.45
Seminar "Nonlinear Wave Equations"

Winter School: Wave equations and Fourier integral operators on models of an expanding universe

Please visit the Website for Details

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15.01.2020, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

Model-based Data Analysis in the Life Sciences

Jan Hasenauer (Universität Bonn), Sebastian Sager (Universität Magdeburg)

14:00 Jan Hasenauer (Universität Bonn) On the mathematical modelling of biochemical reactions networks

15:00 Tea and Coffee Break

15:30 Sebastian Sager (Otto-von-Guericke Universität Magdeburg)

Abstra... 

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14.01.2020, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Construction of asymptotically hyperbolic electrically charged manifolds

Penelope Gehring

Mantoulidis and Schoen constructed smooth asymptotically flat manifolds of dimension 3 with prescribed horizon boundary, whose mass can be made arbitrarily close to the optimal value in the Riemannian... 

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14.01.2020, 16:15-18:45  –  FU Berlin, Arnimalle 6, SR 031
Seminar "Topics in Geometric Analysis"

Topics in Geometric Analysis

Heiko von der Mosel, Lynn Heller

16:15

Heiko von der Mosel

(RWTH Aachen)

On integral Menger curvature

Using concepts from elementary geometry like the circumcircle radius one can construct various families of... 

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13.01.2020, 12:15  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

A Gibbsian model for message routeing in highly dense multihop networks

András Tóbiás (TU Berlin)

We investigate a probabilistic model for routeing of messages in relay-augmented multihop ad-hoc networks, where each transmitter sends one message to the origin. Given the (random) transmitter... 

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13.01.2020, 16:15  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

„Der Garten der Unendlichkeit“: Ein Projekt zur Erforschung der Unendlichkeit in der Sekundarstufe I

Stephanie Kasparek (Bonn)

Es wird ein Projekt vorgestellt, das im Rahmen einer Masterarbeit an der Humboldt-Universität entwickelt wurde. Die Lehrerin wird hier zur Geschichtenerzählerin: „Der Garten der Unendlichkeit“ steht... 

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13.01.2020, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

Hardy's Theorem

Markus Klein

mehr erfahren

10.01.2020, 11:00-12:00  –  Campus Golm, Haus 29, Raum 0.25/0.26
SFB-Seminar

Challenges in Dynamical Systems Inference: New Approaches for Parameter and Uncertainty Estimation

Matthias Chung

Mathematical modeling has been a key tool in various scientific fields (such as biology, medicine, and engineering) in understanding systems dynamics. Parameter inference for such systems have been... 

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10.01.2020, 10:00-11:00  –  Campus Golm, Haus 29, Raum 0.25/0.26
SFB-Seminar

Advancements in Hybrid Iterative Methods for Inverse Problems

Julianne Chung

In many physical systems, measurements can only be obtained on the exterior of an object (e.g., the human body or the earth's crust), and the goal is to estimate the internal structures. In other... 

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09.01.2020, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Stumpfe Winkel

Josephin Kühne

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 17

mehr erfahren

07.01.2020, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Geometric and obstacle scattering at low energy

Alden Waters (Groningen)

We consider the problem of obstacle scattering for the Helmholtz equation with the p-form Laplace Beltrami operator. On manifolds which are asymptotically Euclidean we show resolvent expansions, and... 

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06.01.2020, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

Banach Algebras: The Gleason-Kahane-Zelazko Theorem

Lukas Minogue

mehr erfahren

19.12.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Simplexe, die einander berühren

Noreen Fischer

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 16

mehr erfahren

18.12. bis 18.12.2019, 14:15 Uhr  –  Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Discrete Ricci curcature, diameter bounds and rigidity

Florentin Münch

mehr erfahren

18.12.2019, 14:15 Uhr  –  Campus Golm, Haus 9, Raum 1.10
Verteidigung der Masterarbeit / Defence of the Master's thesis

Das Zentrifugenproblem - ein algebraischer Zugang

Anna-Lena Wegen

mehr erfahren

17.12.2019, 13:00 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Öffentlicher Vortrag

Nonparametric Statistics and Information Theory

Dr. Ester Mariucci

In this talk I will briefly present the research topics I have worked on and discuss the main lines of my future research.
My research interests lie at the frontier between mathematical statistics and... 

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17.12.2019, 15:15 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Öffentlicher Vortrag

Composite-composite testing and extensions

Prof. Alexandra Carpentier

Testing theory is a corner stone of mathematical statistics, with many practical applications. While asymptotic and parametric testing is relatively well understood, many additional issues arise in... 

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17.12.2019, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Boundary value problems for the Lorentzian Dirac operator

Sebastian Hannes

We consider the Dirac operator on a globally hyperbolic spacetime with compact, spacelike Cauchy hypersurfaces. In this setting the Dirac operator is known to be Fredholm and have a smooth solution... 

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16.12.2019, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

The Paley-Wiener Theorem and Hardy's Theorem

Markus Klein

mehr erfahren

16.12.2019, 16:15  –  Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 14, Raum 2.14.0.47
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

The geometry of movement: Designing a gesture-based virtual environment for making and transforming spatial inscriptions

Prof. Justin Dimmel (University of Maine, U.S.A.)

I report on the design and development of HandWaver, an immersive virtual environment for making and transforming spatial inscriptions: representations that are inscribed into space itself, rather... 

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16.12.2019, 12:00  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

The first passage problem for stable linear delay equations perturbed by small power law Lévy noise

Michael Högele (Universidad de los Andes, Bogotà, Colombia)

In this talk we present a linear scalar delay differential equation subject to small multiplicative power tail Lévy noise. We solve the first passage (the Kramers) problem with probabilistic methods... 

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13.12.2019, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Low dimensional approximation of weak constraint variational data assimilation

Melina Freitag (Universität Potsdam)

Weak constraint four-dimensional variational data assimilation is an important method for incorporating data (typically observations) into a model. The resulting minimisation process takes place in... 

mehr erfahren

12.12.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Der Starrheitssatz von Cauchy

Luise Fritsche

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 14

mehr erfahren

11.12.2019, 12:30-14:00  –  Campus Golm, Haus 14, Raum 0.26/27
SFB-Seminar

Bayesian Inference Made Easy via Auxiliary Augmentations

Theo Galy-Fajou (TU Berlin)

Bayesian Inference is almost always a very challenging mathematical and computational problem. In the context of Gaussian Process, only a Gaussian likelihood leads to an analytically tractable... 

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11.12. bis 11.12.2019, 12:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.2.22
Forschungsseminar Diskrete Spektraltheorie

Two trace formulae for Hermitian matrices

Uzy Smilansky (Weizmann Institute of Science)

Trace formulae are one of the most important tools in a large number of fields ranging from quantum chaos via spectral geometry, graphs and number theory. Here, I shall present two rather... 

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11.12.2019, 11:00  –  tba
Forschungsseminar

Seminar on Groupoids and Index Theory: Introduction to K and KK-Theory III

Mehran Seyedhosseini

mehr erfahren

11.12.2019, 10:15  –  Haus 9, Raum 2.22 (Campus Golm)
Verteidigung der Dissertation / Defence of the PhD thesis

Contributions to multiscale statistical analysis on random geometric graphs

Franziska Göbel

Abstract here.

mehr erfahren

11.12.2019, 13:45 Uhr  –  Campus Golm, Haus 9, Raum 2.09.2.22
Forschungsseminar Diskrete Spektraltheorie

Bonnet-Myers theorem for Kato-type Ricci curvature conditions

Dr. Christian Rose (MPI Leipzig)

The Kato condition on the negative part of the Ricci curvature turned out to be an appropriate generalization of Lp- curvature conditions that can be used to investigate geometric and topological... 

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10.12.2019, 15:00-16:00  –  Campus Golm, Haus 9, Raum 2.22
SFB-Seminar

Using data assimilation, systems physiology, and healthcare data to forecast physiology in an intensive care unit: why it is important, what is possible, what is hard, and the state of the art

David Albers (University of Colorado, USA)

In this talk I will present some recent results estimating and forecasting physiology in an intensive care unit (ICU) using sparse, non-stationary data collected while administering care. While I will... 

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10.12.2019, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Wavefront set of a distribution

Wai Tung Poon

On the presentation of my scientific project, I am going to show some properties about microlocal analysis. Firstly, I will define some basic notions about the distribution and Fourier transform of a... 

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09.12.2019, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

Uniqueness and Non-Uniqueness for the Radon Transform

Andreas Hermann

mehr erfahren

09.12.2019, 16:15  –  Freie Universität, Takustr. 9 (Informatikgebäude), 14195 Berlin, großer Hörsaal
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Ein „Atlas der Schulmathematik der Sekundarstufe I“ für die Reise durch den Lern- alltag

Elisabeth Brunner (FU Berlin)

In diesem Vortrag wird der neu entwickelte „Atlas der Schulmathematik der Sekundarstufe I“ vorgestellt. Er er-möglicht es den Lernenden, sich zu jeder Zeit in ihrem Arbeitsprozess innerhalb der... 

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09.12.2019, 13:10  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

The one-dimensional contact process and the KPP equation with noise

Sandra Kliem (Frankfurt)

The one-dimensional KPP-equation driven by space-time white noise,
\[ \partial_t u = \partial_{xx} u + \theta u - u^2 + u^{\frac{1}{2}} dW, \qquad t>0, x \in \mathbb{R}, \theta>0, \qquad \qquad u(0,x)... 

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09.12.2019, 09:15 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Öffentlicher Vortrag

Testing for Independence of Large Dimensional Vectors

Prof. Dr. T. Bodnar

abstract:
In this paper, new tests for the independence of two high-dimensional vectors are investigated. We consider the case where the dimension of the vectors increases with the sample size and... 

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09.12.2019, 11:15 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Öffentlicher Vortrag

Perturbation theory for Markov chains

Prof. Dr. D. Rudolf

Abstract:
Perturbation theory for Markov chains addresses the question of how small differences in the transition probabilities of Markov chains are reflected in differences  between  their... 

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09.12.2019, 14:15 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Öffentlicher Vortrag

Copula-based multiple hypothesis testing

Prof. Dr. T. Dickhaus

Abstract:
Multivariate multiple test procedures have received growing attention recently. This is due to the fact that data generated by modern applications typically are high-dimensional, but possess... 

mehr erfahren

06.12.2019, 14:15  –  Haus 29, Raum 0.25
Verteidigung der Dissertation / Defence of the PhD thesis

Model reduction of mechanism-based pharmacodynamic models and its link to classical drug effect models

Jane Knöchel

mehr erfahren

05.12.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Drei Anwendungen der Euler'schen Polyederformel

Mara Martin

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 13

mehr erfahren

04.12.2019, 11:00  –  Haus 9, Raum 2.22
Forschungsseminar

Seminar on Groupoids and Index Theory: Introduction to K and KK-Theory II

Mehran Seyedhosseini

mehr erfahren

04.12.2019, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

A tribute to Emmy Noether, a hundred years after she obtained her habilitation thesis

Elizabeth Mansfield (University of Kent), David Rowe (Johannes Gutenberg University, Mainz)

14:00 Elizabeth Mansfield (Universität Kent): Noether's Theorem, both smooth and discrete

15:00 Tea and Coffee Break

15:30 David E. Rowe (Universität Mainz): On the Background to Emmy Noether’s... 

mehr erfahren

03.12.2019, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Maxwell's Equations on Globally Hyperbolic Spacetimes with Timelike Boundary

Rubens Longhi

We study Maxwell's equation as a theory for smooth k-forms on globally hyperbolic spacetimes with timelike boundary as defined by Aké, Flores and Sanchez. In particular we start by investigating on... 

mehr erfahren

02.12.2019, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

Fourier Uniqueness via Complex Variables and a Curious Functional Equation

Andreas Braunß

mehr erfahren

28.11.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Hilberts drittes Problem: Zerlegung von Polyedern

Hanna Jürß

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 10

mehr erfahren

27.11.2019, 11:00  –  Haus 9, Raum 2.22
Forschungsseminar

Seminar on Groupoids and Index Theory: Introduction to K and KK-Theory I

Mehran Seyedhosseini

mehr erfahren

27.11. bis 27.11.2019, 12:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.0.14
Forschungsseminar Diskrete Spektraltheorie

On effective impedance of networks

Anna Muranova (Bielefeld University)

Abstract

mehr erfahren

26.11.2019, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

A Functional Analytic Index Theorem

Lennart Ronge (Bonn)

Considering a family of self-adjoint Fredholm operators A(t), the equality ind(D_APS)=sf(A) will be shown under certain conditions. Here, sf(A) denotes the spectral flow of the family A, D_APS is the... 

mehr erfahren

26.11.2019, 16:15-18:45  –  FU Berlin, Arnimallee 6, SR 031
Seminar "Topics in Geometric Analysis"

Topics in Geometric Analysis

Esko Heinonen, Nicolas Marque

16:15 Esko Heinonen

Jenkins-Serrin problem for translating graphs

A translating soliton is a smooth oriented hypersurface S in MxR (or in Rn+1) whose mean curvature satisfies H =... 

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25.11.2019, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

The Hilbert Transform

Lashi Bandara

mehr erfahren

25.11.2019, 12:15  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Frechet differentiable drift dependence of Perron-Frobenius and Koopman operators for stochastic dynamical systems

Han Cheng Lie (Universität Potsdam)

Global long-term properties of dynamical systems, such as their stationary distribution or rate of mixing, are strongly related to spectral objects of certain operators. These operators, which are... 

mehr erfahren

22.11.2019, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Distances for discretely observed jump processes and applications in nonparametric statistics

Ester Mariucci (Universität Potsdam)

The concept of distance is ancient and ubiquitous. Being able to quantify the distance between objects has important applications everywhere in mathematics; just think of approximation theory,... 

mehr erfahren

21.11.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Cayleys Formel für die Anzahl der Bäume

Maximilian Tieze

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 33

mehr erfahren

21.11.2019, 10:00  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Ricci flow from Algebraic Quantum Field Theory III

Claudio Dappiaggi (Pavia)

We discuss the freedom in the construction of Wick polynomials for a non linear Sigma model and we introduce the associated renormalization group flow, proving that it coincides with the Ricci flow.

mehr erfahren

21.11.2019, 13:45 Uhr  –  Raum 2.09.2.22
Institutsveranstaltung

Mitarbeiterversammlung - Employee meeting

Siegfried Beckus, Peter Mahns

mehr erfahren

20.11.2019, 16:30  –  Haus 9, Raum 0.12
Forschungsseminar Differentialgeometrie

Ricci flow from Algebraic Quantum Field Theory II

Claudio Dappiaggi (Pavia)

We apply the algebraic approach to construct the algebra of observables associated to non linear Sigma models. In particular we discuss the notion of Wick polynomials and their realization in terms of... 

mehr erfahren

20.11. bis 20.11.2019, 12:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.0.14
Forschungsseminar Diskrete Spektraltheorie

On Courant's nodal domain property for linear combinations of eigenfunctions (after P. B\'erard, P. Charron and B. Helffer)

Bernard Helffer (University of Paris-Sud)

Abstract: We revisit  Courant's nodal domain property for linear combinations of eigenfunctions. This property was proven by Sturm (1836) in the case of dimension 1.  Although stated as true for the... 

mehr erfahren

20.11.2019, 14:00  –  Campus Golm, Haus 10, Raum 0.25
Institutskolloquium

Mathematische Lernvoraussetzungen für MINT-Studiengänge

Aiso Heinze (Leibniz-Institut, Kiel) + Diskussion

Was erwarten Hochschulen, was sollen Schulen leisten und welche Handlungsmöglichkeiten gibt es?

Seit Jahren werden mangelnde mathematische Kompetenzen von Studienanfängerinnen und Studienanfängern in... 

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19.11.2019, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Ricci flow from Algebraic Quantum Field Theory I

Claudio Dappiaggi (Pavia)

The goal of the these lectures is to give a rigorous derivation of Ricci flow starting from non linear Sigma models, within the framework of algebraic quantum field theory. In the first talk we... 

mehr erfahren

19.11.2019, 16:00-16:45  –  Campus Golm, Haus 9, Raum 2.22

An Introduction to Spectral Theory of Laplacians on Graphs

Noema Nicolussi (University of Vienna)

Abstract: Graphs and their Laplace operators play an important role in various different branches of mathematics (e.g. combinatorics, data science, group theory). A key observation is that many... 

mehr erfahren

18.11.2019, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

The Riesz-Thorin Convexity Theorem

Siegfried Beckus

mehr erfahren

18.11.2019, 16:15  –  Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 14, Raum 2.14.0.47
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

“What you assess is what you get” - Modellierungsaufgaben in die Schule

Dr. Xenia Reit (Universität Duisburg-Essen)

Das Image von Modellierungsaufgaben im Mathematikunterricht ist eigentlich gut, können sie den Schülerinnen und Schülern doch ein reales Bild von Mathematik im Alltag und dessen Nützlichkeit... 

mehr erfahren

18.11.2019, 12:00  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

On diffusion processes in Euclidean space with intersecting membranes

Olga Aryasova (Kyiv)

We consider an Euclidean space with semipermeable membranes on nonsmooth surfaces, for example, on the boundary of a wedge or a cone. We study the existence and uniqueness of a strong Markov process... 

mehr erfahren

14.11.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Gitterwege und Determinanten

Artem Istranin

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 32

mehr erfahren

13.11. bis 13.11.2019, 12:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.0.14
Forschungsseminar Diskrete Spektraltheorie

Approximating the integrated density of states of random Schrödinger operators - results from empirical process theory

Max Kämper (TU Dortmund)

Random Schrödinger operators are a model for metals with random impurities and this talk will present them for the special case of the Anderson operator on a lattice. We will introduce the integrated... 

mehr erfahren

11.11.2019, 16:00  –  Haus 9, Raum 0.12
Oberseminar Analysis, Geometrie, Physik

A Theorem of Beurling

Elke Rosenberger

mehr erfahren

11.11.2019, 12:15  –  Campus Golm Haus 9 Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

A nonlinear integration by parts formula for stochastic differential equations

Sara Mazzonetto

In this talk we introduce a nonlinear integration-by-parts formula for stochastic differential equations. We call it Itô-Alekseev-Gröbner formula because it generalizes both Itô formula and the... 

mehr erfahren

08.11. bis 08.11.2019, 10:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Diffeomorphism groups and isometry groups in symplectic geometry

Steven Rosenberg (Boston University)

It is difficult to say much about the topology of the diffeomorphism group and isometry group of a closed manifold, and few high dimensional results are known.  In work with Staoshi Egi and Yoshi... 

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08.11. bis 08.11.2019, 11:15  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

KO valued spectral flow

Alan Carey (Australian National University, Canberra)

When applied  to condensed matter theory, the spectral flow for paths in the space of skew adjoint Fredholm operators suggests that we consider a generalisation that encompasses all of the classifying... 

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08.11.2019, 10:15-11:15  –  Campus Golm, Haus 12, Raum 0.01
SFB-Seminar

Regret analysis of the Piyavskii-Shubert algorithm

Sébastien Gerchinowitz (Université de Toulouse)

We consider the problem of maximizing a non-concave Lipschitz function f over a bounded domain in dimension d. In this talk we provide regret guarantees for a decade-old algorithm due to Piyavskii and... 

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08.11.2019, 14:00  –  Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Hadamard states for bosonic quantum field theory on globally hyperbolic spacetimes

Max Lewandowski

mehr erfahren

07.11.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Wenige Steigungen

René Hintze

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 12

mehr erfahren

06.11.2019, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

05.11.2019, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Vector Bundles and Characteristic Classes in SageManifolds

Michael Jung

SageMath ("System for Algebra and Geometry Experimentation") is an open source computer algebra system based on Python. It uses various libraries written in R, Fortran, Maxima etc. to realize an... 

mehr erfahren

04.11.2019, 12:15  –  Campus Golm, Haus 09, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Multiscale statistical analysis on random geometric graphs

Franziska Göbel (Universität Potsdam)

In this talk I will present a multiscale approach to construct a data-adapted basis-like (Parseval frame) set of functions F which allows for a decomposition of every square-integrable function... 

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01.11. bis 01.11.2019, 11:15  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Rough change of variable formula for branched rough paths and quasi-shuffle algebras

Carlo Bellingeri (TU Berlin)

Starting from the classical change of variable formula for smooth paths, we will explain how to extend this identity to the case when the underlying path has generic Hölder regularity in the context... 

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30.10. bis 03.11.2019  –  Campus Golm
Veranstaltung der Fachschaft

85. Konferenz der deutschsprachigen Mathematikfachschaften

Die 85. KoMa findet vom 30.10. - 03.11. an der Universität Potsdam statt. Mehr erfahren

mehr erfahren

30.10. bis 30.10.2019, 12:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.0.14
Forschungsseminar Diskrete Spektraltheorie

Infinite Quantum Graphs

Noema Nicolussi (University of Vienna)

Abstract

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30.10.2019, 16:00-16:45  –  Campus Golm, Haus 9, Raum 2.22

Spatiotemporal tracking of virtual markers on moving cell outlines

Daniel Schindler (Universität Potsdam)

Abstract: Amoeboid cell motility is essential for a wide range of biological processes including wound healing, embryonic morphogenesis, and cancer metastasis.
With the ability to generate large... 

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29.10.2019, **16:00**  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Unique continuation for wave equations and applications in general relativity

Oliver Lindblad Petersen (Uni Hamburg)

In a recent paper, Ionescu and Klainerman showed that Killing vector fields on Lorentzian manifolds can be extended using only unique continuation statements for wave equations. Before their work,... 

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25.10.2019, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Numerical integrators for the Hamiltonian Monte Carlo sampler

Jesus Sanz-Serna (Universidad Carlos III de Madrid, Spain)

The Hamiltonian Monte Carlo (HMC) method is a widely used Markov Chain Monte Carlo algorithm that offers the possibility of combining high acceptance rates and nonlocal moves. Most of the... 

mehr erfahren

24.10.2019, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Geraden in der Ebene und Zerlegung von Graphen

Andrea Hübner

Aigner, Ziegler: Das BUCH der Beweise, Kapitel 11

mehr erfahren

23.10.2019, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

A probabilistic outlook on optimal mass transportation and fluid motions

Christian Léonard (Université Paris Nanterre), Marc Arnaudon (Université de Bordeaux)

14:00 Christian Léonard (Université Paris Nanterre): Optimal mass transportation: a probabilistic approach
15:00
Tea and Coffee Break
15:30
Marc Arnaudon (Université de Bordeaux): The motion of... 

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22.10.2019, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

On the number of closed geodesics

Hans-Bert Rademacher (Uni Leipzig)

It is an open question whether any Riemannian metric on a compact manifold has infinitely many geometrically distinct closed geodesics. We first revisit results for generic metrics in the case of... 

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21.10.2019, 10:15-11:15  –  Campus Golm, Haus 14, Raum 0.09
SFB-Seminar

Data assimilation for the stochastic one-layer rotating shallow water system driven by transport noise

Oana Lang (Imperial College London, UK)

In this talk we will present a data assimilation problem based on a new stochastic rotating shallow water (SRSW) signal and an adaptive tempering particle filter algorithm. The model has been obtained... 

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21.10.2019, 12:00  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Weyl asymptotics for discrete Hamiltonians on a scaled lattice

Enrico Reiß (Universität Potsdam)

In mean field theories of statistical mechanics where N particles interact, macroscopic observables typically take values in a scaled lattice with lattice spacing 1/N. An easy but typical example is... 

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18.10.2019, 10:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Observables of the sine-Gordon model in perturbative AQFT

Kasia Rejzner (York)

In this talk, I will present how the formal S-matrix and the interacting fields are constructed in the framework of perturbative algebraic quantum field theory (pAQFT). I will illustrate this on the... 

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18.10.2019, 11:15  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Global Seiberg-Witten maps for U(N)-bundles on tori and T-duality

Paolo Aschieri (Alessandria and Torino)

Seiberg-Witten maps are a method to locally construct noncommutative gauge theories starting from commutative gauge theories. It originated in the context of gauge theories describing low energy... 

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16.10.2019, 12:30  –  Campus Golm, Haus 9, Raum 2.09.0.14
Forschungsseminar Diskrete Spektraltheorie

Nodal statistics of quantum graph eigenfunctions

Prof. Dr. Ram Band (Israel Institute of Technology - Technion)

We discuss the number of zeros of Laplacian eigenfunctions on a metric (quantum) graph.
The n-th eigenfunction has at least n-1 zeros and at most n-1+\beta zeros, where \beta is the number of graph... 

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15.10.2019, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

The Twist of the Free Fermion

Saskia Roos

In this talk we study the free fermion in the framework of functional field theory. It turns out that the theory is twisted due to the chiral anomaly of the free fermion. We give a detailed... 

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14.10.2019, 12:00  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Phase transition of Gibbs point processes using Fortuin-Kasteleyn representation

Pierre Houdebert (Universität Potsdam)

The Fortuin-Kasteleyen representation, introduce in the 1960', is a method used to prove phase transition for Gibbs point process. It reduces the problem of phase transition to the study of... 

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01.10.2019, 9:00 Uhr  –  Haus 10, Raum 0.25
Informationsveranstaltung

Einführungsveranstaltung Bachelor of Science und Bachelor of Education

Diese Einführungsveranstaltung richtet sich an alle Anfängerinnen und Anfänger der Studiengänge Mathematik Bachelor of Science und Bachelor of Education. Die Institutsleitung, die Lehrkräfte der... 

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30.09.2019, 10:15-11:15  –  Campus Golm, Haus 25, Raum F1.01
SFB-Kolloquium

Second Kalman Lecture

Karen Willcox (Institute for Computational Engineering and Sciences, The University of Texas, USA)

Predictive data science for physical systems: From model reduction to scientific machine learning

Achieving predictive data science for physical systems requires a synergistic combination of data and... 

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30.09.2019, 14:15  –  Campus Golm, Haus 29, Raum 0.25/0.26
Institutsveranstaltung

Kick-Off-Meeting UFS Data Centric Sciences

Auf Initiative des Instituts für Mathematik unter Federführung von Herrn Prof. Reich ist ein Universitärer Forschungsschwerpunkt (UFS) mit dem Titel Data centric sciences (DCS) für den Zeitraum 1.... 

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13.09.2019, 10:15-11:15  –  Campus Golm, Haus 9, Raum 0.12
SFB-Seminar

Ensemble Data Assimilation for Coupled Models of the Earth System

Lars Nerger (Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Science, Bremerhaven)

Coupled models simulate different compartments of the Earth system as well as their interactions. For example coupled ocean-biogoechemical models simulate ocean circulation, biogeochemical processes... 

mehr erfahren

11.09.2019, 11:15-11:45  –  Raum 2.22, Haus 09, Campus Golm
Verteidigung der Masterarbeit / Defence of the Master's thesis

Generalized Birth-and-Death Processes

Jens Fischer

Verteidigung der Masterarbeit im Rahmen der Wahrscheinlichkeitstheorie.

Gutachterinnen: Prof. Roelly und Dr. Kosenkova

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09.09.2019, 15:00  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Dubrovin-rings and their connection to Hughes-free skew fields of fractions

Friedrich Jakobs

mehr erfahren

05.09.2019, 11:00-12:00  –  Campus Golm, Haus 9, Raum 0.12
SFB-Seminar

Stellar Astrophysics: the power of simultaneous high resolution stellar spectroscopy, polarimetry and velocimetry. - Rotation, activity and stellar magnetic fields in the A0 standard star Vega

Torsten Böhm, Université de Toulouse

Neo-Narval at TBL/Pic du Midi (France) will be the first instrument working simultaneously in high resolution spectroscopy, polarimetry and velocimetry being entirely dedicated to stellar... 

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03.09.2019, 15:00  –  Campus Griebnitzsee, Haus 6, Hörsaal H01
Gastvortrag

Einführung zu Site Reliability Engineering bei Google

Dr. Christof Leng

Site Reliability Engineers sind Googles DevOps-Experten für den Betrieb der Produkte und internen technischen Infrastruktur. Sie müssen mit der beeindruckenden Größe, dem rasanten Wachstum und der... 

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26.08.2019, 10:15-11:15  –  Haus 28, Raum 0.102
SFB-Seminar

What is the Lagrangian for Nonlinear Filtering?

Prashant Mehta (University of Illinois, USA)

There is a certain magic involved in recasting the equations in Physics, and the algorithms in Engineering, in variational terms.  The most classical of these ‘magics’ is the Lagrange’s formulation of... 

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23.08.2019, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Efficient implementation of an iterative ensemble smoother for big-data assimilation and reservoir history matching

Geir Evensen (NORCE Norwegian Research Centre, Norway)

Raanes et al. (2019) revised the iterative ensemble smoother of Chen and Oliver (2013), denoted Ensemble Randomized Maximum Likelihood (EnRML), using the property that the EnRML solution is contained... 

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22.08.2019, 10:15-11:15  –  Haus 9, Raum 0.12
SFB-Seminar

Applied Data Assimilation: diabetes phenotyping/forecasting + hybrid machine learning approaches

Matthew Levine

Methods from data assimilation, inverse problems, and machine learning have shown exciting potential for transforming biomedicine.
First, I will show how a Bayesian Inverse approach can be used to... 

mehr erfahren

19.08.2019, 10:15-11:15  –  Haus 28, Raum 0.108
SFB-Seminar

Fully Hyperbolic Convolutional Neural Networks

Eldad Haber (University of British Columbia, Canada)

Convolutional Neural Networks (CNN) have recently seen tremendous success in various computer vision tasks. However, their application to problems with high dimensional input and output has been... 

mehr erfahren

13.08.2019, 10:15-11:15  –  Haus 9, Raum 0.12
SFB-Seminar

Kalman-Wasserstein Gradient Flows

Franca Hoffmann (California Institute of Technology, USA)

We study a class of interacting particle systems that may be used for optimization. By considering the mean-field limit one obtains a nonlinear Fokker-Planck equation. This equation exhibits a novel... 

mehr erfahren

06.08.2019, 11:00  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Didaktische Herangehensweise zur Einführung des Bruchzahlbegriffs in der 5. Klassenstufe basierend auf dem mathematischen Konzept der Zahlbereichserweiterung

Tabea Johanna Polziehn

mehr erfahren

19.07.2019, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Singular foliations and Morita equivalence

Alfonso Garmendia (KU Leuven University)

A natural example of quotient spaces are the ones given by a singular foliation on a manifold. In this case we have a canonical groupoid to model it, the holonomy groupoid.

This talk gives an... 

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18.07.2019, 16:15  –  Haus 9, Raum 0.12
Forschungsseminar Differentialgeometrie

Elliptic boundary conditions in linearized elastostatics

Claudia Grabs

We consider boundary value problems in linearized elastostatics for isotropic materials. It is known that Dirichlet boundary conditions are strongly elliptic boundary conditions in the sense of... 

mehr erfahren

17.07.2019, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

Holomorphic functional calculus and nonlinear evolution equations

Sylvie Monniaux (Université Aix-Marseille), Lutz Weis (Universität Karlsruhe)

Programm

14:00 Sylvie Monniaux (Université Aix-Marseille): Maximal regularity and Navier Stokes equations

15:00 Tea and Coffee Break

15:30 Lutz Weis (Universität Karlsruhe): The H-calculus and its... 

mehr erfahren

17.07.2019, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Groupoids and Morita equivalence

Alfonso Garmendia (KU Leuven University)

Quotients spaces present a problem in differential geometry, given that usually quotients of manifolds are not smooth. One way to deal with this problem is using Lie groupoids.

Nevertheless, a... 

mehr erfahren

15.07.2019, 12:00  –  Golm Haus 9 Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Continuum limits of tree-valued stochastic processes

Wolfgang Löhr (Universität Duisburg-Essen)

Markov chains on sets of (finite, graph-theoretic) trees arise in applications, e.g., as evolving genealogical trees in population models or in Markov chain Monte Carlo methods for the reconstruction... 

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15.07.2019, 16:00  –  Raum 2.22
Forschungsseminar Differentialgeometrie

Around the Relative Index

Mehran Seyedhosseini (Göttingen)

mehr erfahren

12.07.2019, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Neuronal networks and functional connectivity

Patricia Reynaud-Bouret (CNRS / University of Nice, France)

After giving a short introduction to biological neuronal networks and their main properties, I will explain why neurobiologists are interested by functional connectivity, which form a mathematical... 

mehr erfahren

12.07.2019, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

On Locality in Perturbative Quantum Field Theory

Konstantin Wernli (Universität Zürich)

I will discuss how to incorporate Atiyah-Segal approach to locality in
quantum field theory – namely, the behaviour of the partition function
under the cutting and gluing – in the perturbative setting.... 

mehr erfahren

10.07.2019, 10:15  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Change-point detection for seismicity parameter

Bernhard Fiedler

mehr erfahren

10.07.2019, 10:30 Uhr  –  *Haus 14 Golm, Raum 0.24/25*
Arbeitsgruppenseminar Analysis

Robin Laplacian on functions

Georges Habib (Lebanese University)

Given a Riemannian manifold with boundary, we will establish a new estimate for the first eigenvalue of the Laplacian with Robin boundary conditions. These estimates are expressed in terms of the... 

mehr erfahren

09.07.2019, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Mould and comould algebras with composition structure

Olivier Bouillot (Université Paris-Est Marne-la-Vallée)

Mould calculus is a powerful combinatorial tool which has been developed in the
late 80's by J. Ecalle. It often provides some explicit formulae when there are
no other available computational methods.
I... 

mehr erfahren

08.07.2019, 12:00  –  Golm, Haus 9, Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Concentration of weakly dependent Banach-valued sums and applications to statistical learning methods.

Oleksandr Zadorozhnyi (Potsdam)

In the talk I present a Bernstein type inequality for Banach-valued random sums under weak-dependency assumption of general kind on the variables and smoothness assumption on the underlying Banach... 

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04.07. bis 04.07.2019, 16.15  –  University Potsdam, Room 2.22
Seminar "Topics in Geometric Analysis"

Topics in Geometric Analysis

Armando Cabrera Pacheco, Bruno Premoselli

16:15Armando Cabrera Pacheco Extensions of minimal Bartnik data and the Bartnik mass

The Bartnik mass is an important notion of quasi-local mass in mathematical relativity, although it has the... 
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04.07.2019, 16:15  –  Haus 9, Raum 0.12
Forschungsseminar Differentialgeometrie

The Rarita-Schwinger operator - an introduction

Peter Grabs

mehr erfahren

03.07.2019, 14:00-16:00  –  2.09.2.22
Doktorandentag

Ph.D. Day

Christian Scholz, Jens Fischer, Florian Fischer

14:00 -14:30 Christian Scholz: Heat Equation and Heat Kernel Bounds on Graphs.
14:45- 15:15 Jens Fischer: Markov Chains and some Stopping Times.
15:15- 15:30 Break. Election of the new PhD... 

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01.07.2019, 12:00  –  Golm Haus 9 Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Precise asymptotics of rough stochastic volatility models

Paolo Pigato (WIAS Berlin)

I will review some empirical facts on implied volatility and how they recently led to the introduction of rough (fractional) stochastic volatility models in finance. I will recall some results in... 

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26.06.2019, 17:30  –  Campus Golm, Grillplatz bei der Mensa
Institutsveranstaltung

Institutsfest 2019

mehr erfahren

21.06.2019, 10:15-11:15  –  Campus Golm, Haus 14, Raum 0.21
SFB-Seminar

Probabilistic Linear Solvers

Jon Cockayne (University of Warwick, UK)

A fundamental task in numerical computation is the solution of large linear systems, and iterative methods are among the most widely used solvers for sparse linear systems. However, for more... 

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20.06.2019, 16:15  –  Haus 9, Raum 0.12
Forschungsseminar Differentialgeometrie

Boundary value problems for the Dirac operator on Riemannian and Lorentzian manifolds

Christian Bär

Boundary value problems for the Dirac operator on a Riemannian manifolds are rather well understood. In particular, one has a general description of admissible boundary conditions. The Lorentzian case... 

mehr erfahren

19.06.2019, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

14.06.2019, ab 9:00 Uhr  –  Campus Griebnitzsee
Informationsveranstaltung

Hochschulinformationstag 2019

Alle Studieninteressierten sind herzlich eingeladen zum Hochschulinformationstag der Universität Potsdam. Dort stellen alle Studienfächer ihr Angebot vor. Außerdem sind auf einem Infomarkt die... 

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14.06.2019, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Ecological Validity of the N170 – a mobile EEG study

Peter König (Universität Osnabrück)

Are event related potentials, well investigated under laboratory conditions, a signature of cortical processing during natural behavior?
We explore this question with a fully mobile recording setup.... 

mehr erfahren

13.06. bis 13.06.2019, 16.15  –  Free University Berlin, Arnimallee 3, HS 001
Seminar "Topics in Geometric Analysis"

Topics in Geometric Analysis

Wolfgang Maurer, Melanie Graf

16:15Wolfgang Maurer Curvature Flows Without Singularities

I'll give an overview of my work on curvature flows without singularities. The concept was introduced by Sáez and Schnürer in '14. They... 
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12.06.2019, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

Reversibility vs Irreversibility in gas dynamics

Thierry Bodineau (École Polytechnique, Palaiseau), Laure Saint-Raymond (École Normale Supérieure, Lyon)

Abstract

Consider the Hamiltonian dynamics of a system of hard spheres, such as billiard balls or marbles. In the kinetic limit (when the number of spheres tends to infinity), the system is described... 

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05.06. bis 05.06.2019, 4 pm  –  Golm, Haus 9, Raum 2.22

How should we describe spatial point patterns?

Alexander Zass

mehr erfahren

03.06.2019, 12:00  –  Golm, Haus 9, Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

The turnpike property, large deviations, and the Schrooedinger problem.

Giovanni Conforti (Ecole Polytechnique)

In deterministic control, the turnpike property is the fact that optimal solutions consist approximatively of three pieces. The first and third pieces are rapid transitions from the initial state to a... 

mehr erfahren

31.05.2019, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Coadjoint action and complete integrability

Chand Devchand (AEI)

I will review the link between coadjoint orbits of Lie groups and completely integrable flows, concentrating on infinite dimensional Lie groups related to field theory examples.

mehr erfahren

29.05.2019, *14:00 Uhr*  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Lie groups of bisections of a Lie groupoid

Alexander Schmeding (Technische Universität Berlin)

To a Lie groupoid one can associate an infinite dimensional Lie group, the so called bisection group.
These groups are closely connected to the geometry and representation theory of the underlying Lie... 

mehr erfahren

27.05.2019, 12:00  –  Golm, Haus 9, Raum 0.13
SFB-Seminar

Non–linear functionals preserving normal distribution and their asymptotic normality

Linda Khachatryan (Yerevan, Armenia)

We introduce sufficiently wide classes of non-linear functionals preserving normal (Gaussian) distribution and establish various conditions under which a sequence of such functionals is... 

mehr erfahren

27.05.2019, 16:15 bis 17:45  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Mathematik mit fischertechnik

apl. Prof. Dr. Thomas Püttmann

Spielend Mathematik lernen – zu diesem Zweck habe ich Modelle, Apparate und Instrumente aus fischer-technik-Teilen entwickelt, die unmittelbar zum Ausprobieren und Experimentieren auffordern. Die... 

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23.05. bis 23.05.2019, 16.15  –  University Potsdam, Room 2.22
Seminar "Topics in Geometric Analysis"

A flow approach to Bartnik's static metric extension conjecture in axisymmetry

Oliver Rinne

Metric extension problems for the static vacuum Einstein equations with prescribed geometric data on an inner boundary 2-surface arise in the context of Bartnik's proposal of a quasi-local mass in... 

mehr erfahren

22.05. bis 22.05.2019, 4:00 - 4:30 pm  –  Haus 9, Raum 2.22

Characteristic Classes implemented in SageMath

Michael Jung

SageMath is an open source variant of Mathematica and useful in various areas in mathematics. For my master thesis, I implement characteristic classes of vector bundles using the ... 

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20.05.2019, 16:15 bis 17:45  –  Campus Golm, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

The enabling role of dynamic interactive mediation of mathematical objects in a dy-namic interactive environment

Anna Baccaglini-Frank (University of Pisa)

The talk focuses on mathematical discourse (from a commognitive perspective) in the context of dynamic geometry and algebra software, environments in which one can construct virtual objects which... 

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20.05.2019, 12:00  –  Golm Haus 9 Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Random walk with lagging

Oleksandr Prykhodko (Kyiv)

We will construct a random walk with specific lagging in point 0 and prove that for appropriate scaling the limiting process is so-called sticky Brownian motion.

mehr erfahren

17.05.2019, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Instantons on quaternionic Kähler manifolds and prepotentials

Andrea Spiro (Università di Camerino)

An instanton on a quaternionic Kähler manifold is a connection on a principle bundle, whose  curvature is pointwise adapted to the quaternionic structure of the tangent space. 

These instantons are... 

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16.05.2019, 15:00  –  Auditorium maximum, Haus 8, Campus Am Neuen Palais
Öffentlicher Vortrag

Leibniz Kolleg Potsdam 2019: Fit in die Zukunft

Prof. Dr. Willem van Mechelen (VU University Medical Center Amsterdam, Niederlande), Prof. Dr. Soyoung Park (DIfE Potsdam / Charité Berlin)

Programm

ab 09:40 Uhr: Einführungsvorträge

ab 15:00 Uhr: Hauptvorträge

  • Physical activity behaviour: about nature, nurture and beyond
    Prof. Dr. Willem van Mechelen
    VU University Medical Center Amsterdam,... 
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16.05.2019, 16:15  –  Haus 9, Raum 0.12
Forschungsseminar Differentialgeometrie

Total squared curvature of surfaces in Riemannian manifolds

Ernst Kuwert (Albert-Ludwigs-Universität Freiburg)

We discuss the problem of minimizing the total squared curvature of compact surfaces in closed Riemannian manifolds. In particular, we present an area bound in terms of the curvature for many... 

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15.05.2019, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Institutskolloquium

Regularization theory for inverse problems

Bernd Hofmann (TU Chemnitz), Elena Resmerita (Alpen-Adria Universität Klagenfurt)

Programm

14:00 Bernd Hofmann: An introduction to regularization theory for inverse problems

15:00 Tea and Coffee break

15:30 Elena Resmerita: Old and new facets of sparsity promoting regularization

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13.05.2019, 16:15 bis 17:45  –  Freie Universität, Takustr. 9 (Informatikgebäude), 14195 Berlin, großer Hörsaal
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Entdeckendes Lernen neu denken!

StRin Pauline Linke

„Ich habe heute etwas im Mathematikunterricht entdeckt!“ Diese Aussage hören wir leider viel zu selten von unseren Schülerinnen und Schülern und das obwohl entdeckendes Lernen ein in der... 

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11.05.2019, 13:00-20:00  –  Campus der Fachhochschule Potsdam
Informationsveranstaltung

Potsdamer Tag der Wissenschaften 2019

Der Potsdamer Tag der Wissenschaften 2019 findet auf dem Campus der Fachhochschule Potsdam statt. Weitere Informationen finden Sie auf der Seite des Potsdamer Tags der Wissenschaften.

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10.05.2019, 14:00  –  Auditorium Maximum, Haus 8, Am Neuen Palais
Öffentlicher Vortrag

Euler-Vorlesung 2019

Claire Voisin (Collège de France, Paris), Christian Gilain (Sorbonne Université, Paris)

Die Euler-Vorlesung 2019 wird von der französischen Mathematikerin Claire Voisin gehalten. Der traditionelle historische Vortrag wird von Professor Christian Gilain gehalten.

Claire Voisin (Collège... 

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08.05.2019, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Real spectral flow

Alan Carey (ANU, Canberra)

Witten introduced the notion of real spectral flow in the late 1980s in connection with anomalies.
His idea is quite correct but there is a gap in the argument that may be filled in using an extension... 

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03.05.2019, 10:15-11:15  –  Haus 9, Raum 0.12
SFB-Seminar

Downscaling Data Assimilation Algorithm for Dissipative Evolution Models Employing Coarse Mesh Observables

Edriss Titi (Texas A&M University, USA)

One of the main characteristics of in finite-dimensional dissipative evolution equations, such as the Navier-Stokes equations and reaction-diff usion systems, is that their long-time dynamics... 

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03.05.2019, 11:00  –  University of Hamburg, Geomatikum, Bundesstraße 55
Seminar "Nonlinear Wave Equations"

Fourier Integral Operators

TBA

11:00TBAGlobal theory of Fourier integral operators 1
13:30TBAGlobal theory of Fourier integral operators 2
15:00TBAProducts with vanishing principal symbol
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03.05.2019, 14:00  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Relative Rank of Infinite Full Transformation Semigroups with Restricted Range

Kittisak Tinpun

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02.05.2019, 16:15  –  Haus 9, Raum 0.12
Forschungsseminar Differentialgeometrie

Hadamard states for bosonic quantum field theory on globally hyperbolic spacetimes

Max Lewandowski

The semiclassical model of quantum field theory on curved spacetimes is considered as an intermediate step in the direction of some quantum theory of gravitation, which however already yields... 

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29.04.2019, 12:00  –  Golm, Haus 9, Raum 0.13
SFB-Seminar

An extension of Dobrushin's uniqueness criterion and applications to Gibbs point processes

Tanja Pasurek (Bielefeld)

We extend the classical Dobrushin's uniqueness criterion to Markov random fields on general graphs and with single-spin spaces that need not be locally compact. As a by-product of the method, we... 

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29.04.2019, 16:15 bis 17:45  –  Campus Golm, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Zur Förderung von Reflexions- und Lernprozessen in regionalen Fortbildungsveranstaltungen

Hans-Joachim Brenner (Albert-Schweitzer-Gymnasium, Erfurt)

Im Kolloquium wird ein seit 2003 durchgeführtes Projekt vorgestellt, das der empirischen Forschung zu-zuordnen ist – eine Fallstudie mit qualitativem Rahmen; Aktions- und Praxisforschung von der... 

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26.04.2019, 10:15-11:15  –  Haus 9, Raum 0.12
SFB-Seminar

Kabinettwatch: Wer wird was im Bundeskabinett?

Julia Fleischer (Universität Potsdam)

Talk by Julia Fleischer and Markus Seyfried

Das Projekt Kabinettwatch beschäftigt sich mit der Vorhersage der Zusammensetzung des Bundeskabinetts nach einer Bundestagswahl, während der Phase der... 

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25.04.2019, 16:15  –  Haus 9, Raum 0.12
Forschungsseminar Differentialgeometrie

The Yamabe problem on Lorentzian manifolds

Viktoria Rothe

Let M be a spatially compact globally hyperbolic Lorentzian manifold of dimension 4. We will examine under which conditions the Yamabe equation on M has a positive solution for all times in a given... 

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24.04.2019, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

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17.04.2019, 14:00  –  Haus 9, Raum 2.22
Institutskolloquium

Lessons from General Relativity for Riemannian Geometry

Anna Sakovich (Uppsala University), Michael Eichmair (University of Vienna)

14:00 Anna Sakovich (Uppsala University): Mass in Riemannian Geometry and General Relativity

15:00 Tea and Coffee break

15:30 Michael Eichmair (University of Vienna): The isoperimetric problem for... 

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15.04.2019, 12:00  –  Golm, Haus 9, Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Incremental Cover Trees for Dynamic Diversification

Hannah Marienwald (TU Berlin)

Dynamic diversification – finding a set of data points with maximum pairwise distance from a time-dependent sample pool – is an important, but NP-hard problem in many different applications.... 

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12.04.2019, 10:15-11:15  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

All-at-once versus reduced formulations of inverse problems and their regularization

Barbara Kaltenbacher (Alpen-Adria Universität Klagenfurt)

Parameter identification problems typically consist of a model equation, e.g. (systems of) ordinary or partial differential equations, and the observation equation. In the conventional reduced... 

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12.04.2019, 11:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

Fourier Integral Operators

Markus Röser, Oliver Lindblad, Áron Szabo

11:00Markus RöserConic Lagrangian manifold
13:30Oliver LindbladInvariant definition of the principal symbol 1
15:00Áron Szabo Invariant definition of the principal symbol 2
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09.04.2019, 13:00-14:00  –  Haus 9, Raum 2.22
SFB-Seminar

Assimilating data with outer probability measures

Jeremie Houssineau (University of Warwick)

Although using probability distributions to model uncertainty is by far the most widely accepted approach, it does not come without inconveniences. A basic example of such shortcomings is the... 

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08.04.2019, 12:00  –  Golm, Haus 9, Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Existence of limiting correlation functions and their cluster representation

Suren Poghosyan (Yerevan, Armenia)

The traditional method for the construction of the limiting Gibbs measure uses the thermodynamic limit of the finite volume correlation functions. These limiting correlation functions are defined... 

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08.04.2019, 16:15 bis 17:45  –  Haus 28, Physik-Hörsaal 0.108
Oberseminar Didaktik

Schülerhandlungen beim Umgang mit Mathematik - Potentiale und Grenzen einer tätigkeitstheoretischen Grundlegung

Prof. Regina Bruder (TU Darmstadt)

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06.04.2019, 10:00 Uhr  –  Campus Golm, Haus 9
Schülerförderung

Schülerförderung 06.04.2019

Christian Bär, Sylvie Paycha

Klasse 9/10: Prof. Christian Bär: Das Färben von Landkarten

Auf Landkarten färbt man die Länder der besseren Übersichtlichkeit halber ein und zwar so, dass benachbarte Länder stets... 

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05.04.2019, 10:15-11:15  –  Campus Griebnitzsee, H. 06, R. 3
SFB-Kolloquium

Joined Colloquium of SFB 1114 and SFB 1294 with Felix Otto - Effective behavior of random media

Felix Otto (Max-Planck-Institut für Mathematik in den Naturwissenschaften, Leipzig)

In engineering applications, heterogeneous media are often described in statistical terms. This partial knowledge is sufficient to determine the effective, i. e. large-scale behavior. This effective... 

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01.04. bis 03.04.2019, 9:15  –  House 9 at the Campus Am Neuen Palais
Workshop

Singular diffusions: analytic and stochastic approaches, I

This Workshop is orginised in the framework of the research group linkage between the Institute of Mathematics of the University of Potsdam and the Insitute of Mathematics at the National Academy of... 

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29.03.2019, 10:15-11:15  –  Haus 9, Raum 0.14
SFB-Seminar

Asymptotic equivalence for diffusion processes and the corresponding Euler scheme

Ester Mariucci (Universität Potsdam)

When looking for asymptotic results for some statistical model, global asymptotic equivalence, in the Le Cam sense, often proves to be a useful tool that allows to work in a simpler model. In this... 

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29.03.2019, 08:30  –  Haus 25
Informationsveranstaltung

Future Learning Camp

Lernen und Erleben wird zunehmend virtuell: Virtual-Reality-Brillen, 360-Grad-YouTube-Videos oder Augmented-Reality Apps sind nicht nur beliebte Freizeitbeschäftigungen, sondern finden auch immer mehr... 

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28.03.2019, 14:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Attractors of the Einstein-Klein-Gordon system

Zoe Wyatt (University of Edinburgh)

A key question in general relativity is whether solutions to the Einstein equations, viewed as an initial value problem, are stable to small perturbations of the initial data. For example, previous... 

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28.03.2019, 15:30  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Structure from turbulence, or why you might want to care about plasma physics even if you are not a plasma physicist

Ilya Y. Dodin (Princeton University)

Turbulence has always been a tough subject to study. Interestingly though, typical turbulence equations are similar in form to those that govern nondegenerate quantum plasmas, which are easier to... 

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18.03. bis 22.03.2019  –  Tilburg (Holland)
Studienreise

Studienreise nach Tilburg (in Planung)

Koordination: Claudia-Susanne Günther

Teilnehmende:Potsdamer Lehramtsstudierende des Faches Mathematik
Programm:Besuch von Mathematikdidaktikseminaren, Begleitung von Tilburger Studierenden im Praktikum, Hospitation im Mathematikunterricht... 
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17.03.2019, 10:30  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Tensor and universal enveloping algebras

Diego Lopez (UP)

After recalling basic definitions in the context of locality, we shall prove the equivalence of  universal properties with/without locality for
tensor and enveloping algebras.

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11.03.2019, 15:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Wave equations on the Schwarzschild spacetime

Ariane Beier

The scalar wave equation on Schwarzschild spacetime allows physical relevant generalizations incorperating a topological quantum number and fields of higher spin. This talk focusses on the derivation... 

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04.03. bis 08.03.2019  –  Campus Am Neuen Palais, Haus 9
Konferenz

Microlocal and Global Analysis, Interactions with Geometry

Colloquium in honor of Professor Schulze's 75th birthday

Part of this conference will be a special colloquium on Wednesday, March 6, 2019, in honor of Professor Bert-Wolfgang Schulze who will... 

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02.03.2019, 10:00 Uhr  –  Campus Golm, Haus 9
Schülerförderung

Schülerförderung 02.03.2019

Prof. Gilles Blanchard, Stefan Mauerberger

Klasse 9/10: Prof. Gilles Blanchard: Einführung in die Kombinatorik

Wie viele unterschiedliche Playlists von 10 Songs kann man aus einer Musikbibliothek von 500 Songs zusammenstellen? Wieso bringt... 

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28.02.2019, **15:15**  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Feynman integrals with the Green kernel

Pavel Hajek (Universität Augsburg)

For a closed oriented Riemannian manifold M, we consider integrals associated to trivalent ribbon graphs decorated with harmonic forms at exterior vertices and the Green kernel G(x,y) at interior... 

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27.02.2019, 13:00 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

Interpolation Theory for Singular Integrals on Spaces of Homogeneous Type

Philipp Bartmann

We will discuss aspects of classical interpolation theory including properties of the Hardy–Littlewood maximal function and Marcinkiewicz’s interpolation theorem. Further, we will establish the... 

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26.02.2019, **15:15**  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Complements of 2-tori in closed smooth simply connected 4-manifolds that admit a complete finite volume hyperbolic structure

Hemanth Saratchandran (Universität Augsburg)

The study of hyperbolic knot complements has a long history leading to many exciting results in the field of 3-manifold topology. In this talk, I will present a 4-dimensional analogue of this study.... 

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20.02.2019, 16:00 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

Globale topologische Poincaré Ungleichung auf Graphen

Jonas Grünberg

 

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18.02.2019, 11:00  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Gaussian processes with inequality constraints

François Bachoc

We consider a Gaussian process subjected to inequality constraints (for instance boundedness, monotonicity or convexity). These types of inequality constraints correspond to additional information on... 

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15.02.2019, 13:00 – 17:00  –  2.09.0.12
Begegnungen mit Mathematik

Blockveranstaltung 3

Koordination: Claudia-Susanne Günther, Karen Reitz-Koncebovski, Peter Klöpping

Weitere Informationen finde Sie in PULS.

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14.02.2019, 13:00 – 17:00  –  2.09.0.12
Begegnungen mit Mathematik

Blockveranstaltung 2

Koordination: Claudia-Susanne Günther, Karen Reitz-Koncebovski, Peter Klöpping

Weitere Informationen finde Sie in PULS.

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14.02.2019, 14:00 - 17:00  –  Haus 9, Raum 2.22
Doktorandentag

PhD Day

PhD Day of the Institute of Mathematics

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13.02.2019, 13:00 – 17:00  –  2.09.0.12
Begegnungen mit Mathematik

Blockveranstaltung 1

Koordination: Claudia-Susanne Günther, Karen Reitz-Koncebovski, Peter Klöpping

Weitere Informationen finde Sie in PULS.

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11.02.2019, 11:00  –  Golm Haus 9 Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Conditioned point processes with applications to Lévy bridges

Tania Kosenkova

In the talk, we present a characterization of the bridges of Lévy processes through a functional equation. This result allows us to obtain stochastic domination for the bridges through unconditioned... 

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11.02. bis 15.02.2019, 10:00-12:00 und 14:00-16:00  –  Haus 9, Räume 0.13 und 0.14
Informationsveranstaltung

Fragestunden zu Analysis 1 und Lineare Algebra 1

Simon Hirscher

Montag 11.02. von 10:00 bis 12:00 in 2.09.0.14
Montag 11.02. von 14:00 bis 16:00 in 2.09.0.13

Dienstag 12.02. bis Freitag 15.02. jeweils von 10:00 bis 12:00 und von 14:00 bis 16:00 in 2.09.0.14

Dies... 

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08.02.2019, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

The geometric structure underlying the standard model of particle physics

Shane Farnsworth (MPI for Gravitational Physics, Golm)

Many patterns and features in our current models of physics remain deeply mysterious. What determines the symmetries and particle content we observe in experiment for instance? Alain Connes has argued... 

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07.02.2019, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Short course on Lévy Processes - Part 2

Ester Mariucci

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Part 2: Statistics for jump processes

In the second part of the mini course, we will discuss how to estimate the Lévy measure from... 

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07.02.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Multiplikative Sequenzen 2

Andreas Hermann

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07.02.2019, 17:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Topics in Geometric Analysis"

Joint Seminar

Hanne Hardering

17:00Hanne HardeningGeodesic surface finite elements

We study the discretization of maps from a smooth embedded hypersurface into a smooth Riemannian manifold. The discretization is given by a... 
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06.02.2019, 14:00  –  Haus 9, Raum 2.22
Institutskolloquium

Aperiodic systems from a spectral point of view

Jean Bellissard (Georgia Institute of Technology Atlanta and WWU Münster), Hans Daniel Lenz (Universität Friedrich Schiller Jena)

14:00 Jean V. Bellissard: Self-adjoint Operators on aperiodic media

15:00 Tea and Coffee break

15:30 Hans Daniel Lenz: Discrete spectrum for topological dynamical systems

 

Jean V. Bellissard... 

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04.02.2019, 10:15  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

On perturbation of an ODE with non-Lipschitz coefficients by a small noise & On mutual behavior of solutions of an SDE with non-regular drift

Olga Aryasova & Andrey Pilipenko

10:15-11:00 : A. Pilipenko, On pertubertation of an ODE with non-Lipschitz coefficients by a small noise

We study the limit behavior of an ordinary differential equation with non-Lipschitz... 

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04.02.2019, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Stability and instability issues for Vlasov-like equations in gravitational kinetic theory

Mohammed Lemou (IRMAR Rennes, France)

I will start by giving a short overview of the history around stability and instability issues in gravitational systems driven by kinetic equations. Conservations properties and families of... 

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01.02.2019, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

Pharmacometrics: Analysing and understanding variability and uncertainty in clinical data

Charlotte Kloft (FU Berlin)

For new medicines to be approved for therapeutic use, three internationally accepted criteria have to be met: efficacy, safety, quality. Yet, in drug development and drug therapy, the complex... 

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31.01.2019, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Short course on Lévy Processes - Part 1

Ester Mariucci

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Part 1: Why do we add jumps to the Brownian motion?

In the first part of the mini course we will focus on jump processes with independent... 

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31.01.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Multiplikative Sequenzen 1

Andreas Hermann

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31.01.2019, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Infinite dimensionality of kernels of Neumann Laplacians induced by first-order elliptic operators

Lashi Bandara

We consider first-order elliptic differential operators on a compact manifold with boundary. We show that the kernel of the maximal extension, which coincides with the kernel of its associated Neumann... 

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31.01.2019, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Classical and Quantum impulsive Scattering

Herbert Balasin (TU Wien)

Using the framework of Colombeau's generalized functions, I will discuss the motion of both the classical as well as the quantum motion of a particle in an impulsive background.

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30.01.2019, 16:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

Parabolic Harnack Inequality, Gaussian Estimates and Geometric Properties on Graphs

Christian Scholz

Consider a countable set and a weighted, uniformly locally finite graph. In his paper "Parabolic Harnack inequality and estimates of Markov chains on graphs", Delmotte proves that parabolic Harnack... 

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30.01.2019, 10:30 Uhr  –  *2.05.103*
Arbeitsgruppenseminar Analysis

Typed trees and their algebraic structures

Loïc Foissy (LMPA, Calais)

Typed trees are used by Bruned, Hairer, Zambotti in order to deal with stochastics PDE. We here explore the algebraic structures of these combinatorial objects: prelie products, operadic compositions,... 

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30.01.2019, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

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29.01.2019, 11:00  –  University of Hamburg, Geomatikum, Bundesstraße 55
Seminar "Nonlinear Wave Equations"

Fourier Integral Operators

Áron Szabo, Markus Röser

11:00Markus RöserSymplectic Vector Spaces, Room H2
13:30Áron SzaboSymplectic Differential Geometry, Room H127
15:00Markus RöserLagrangian Manifolds, Room H1240
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25.01.2019, 11:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Circle and sphere bundles in noncommutative geometry

Francesca Arici (MPI Leipzig)

In this talk I will recall how Pimsner algebras of self-Morita equivalences can be thought of as total spaces of quantum circle bundles, and the associated six term exact sequence in K-theory can be... 

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24.01.2019, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Research data management

Z03: Tobias Scheffer, Hendrik Gessner

Project Z03

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

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24.01.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Die Pontrjagin-Klassen

Lashi Bandara

mehr erfahren

24.01.2019, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Cauchy problem for the Dirac operator on globally hyperbolic manifolds with timelike boundary

Nadine Große (Freiburg)

We consider the Dirac operator on globally hyperbolic manifolds with timelike boundary and ask for well-posedness of the Cauchy initial-boundary value problem coupled to MIT-boundary conditions. This... 

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23.01.2019, 14:00  –  Haus 9, Raum 2.22
Institutskolloquium

Differential operators on manifolds: where analysis meets geometry

Jan Slovák (Brno, Czech Republic), Nadine Große (Freiburg)

14:00 Nadine Große (Freiburg): Boundary value problems: an approach via bounded geometries
In this talk, we consider boundary value problems on domains with non smooth boundaries. For the Dirichlet... 

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21.01.2019, 16:15 - 17:45  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Mathematik ... angewandt, abgewandt – und zugewandt

Prof. em. Dr. Wilfried Herget (Martin-Luther-Univ. Halle-Wittenberg)

… angewandt: Mathematik lernen – wozu soll das gut sein? Eine Antwort darauf ist ein anwendungs- und realitätsorientierter Mathematikunterricht. Er zeigt: Mathematik ist nützlich.
… abgewandt: Doch... 

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21.01.2019, 10:15  –  Golm, Haus 9, Raum 2.22
SFB-Seminar

Nash Equilibria for Stochastic Games with Singular Control

Jodi Dianetti

A singular stochastic control problem typically describes the situation in which an agent has to choose optimally an irreversible strategy in order to minimize a certain cost functional. In this talk... 

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19.01.2019, 10:00 Uhr  –  Haus 9
Schülerförderung

Schülerförderung 19.01.2019

Joachim Gräter, Sebastian Reich

Klasse 9/10: Prof. Joachim Gräter: Zahlenkongruenzen / Chinesischer Restsatz

Frau Noether möchte ihre 21 Schüler großzügig mit Schokoriegeln belohnen. Sie kauft Tüten von Schokoriegeln, bei... 

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18.01.2019, 10:15-11:45  –  Haus 9, Raum 0.14
SFB-Seminar

Uniform estimates for particle filters

Pierre del Moral (INRIA Bordeaux)

This talk is concerned with the long time behavior of particle filters and Ensemble Kalman filters. These filters can be interpreted as mean field type particle interpretation of the filtering... 

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18.01.2019, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

On the composition of iterated integrals from a Hopf algebraic viewpoint

Kurusch Ebrahimi-Fard (NTNU Trondheim, Norway)

We will discuss a Faà di Bruno type Hopf algebra encoding the composition of Chen-Fliess series of iterated integrals.

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18.01.2019, 9:30 Uhr  –  Haus 9, Raum: 2.22
Arbeitsgruppenseminar Analysis

Renormalization loop

Alessandra Frabetti (Université Lyon 1)

In perturbative quantum field theory, the renormalization group is a  group of formal diffeomorphisms in the powers of the coupling  constant, with coefficients built on the counterterms of divergent... 

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17.01.2019, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Drift and diffusion estimation in stochastic differential equations

A01: Wilhelm Stannat, Markus Reiß

Project A01

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

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17.01.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Die Chern-Klassen

Lashi Bandara

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17.01.2019, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Asymptotically hyperbolic extensions of Riemannian manifolds

Penelope Gehring (Tübingen)

Mantoulidis and Schoen constructed smooth asymptotically flat initial data sets of dimension 3 with prescribed horizon boundary, whose mass can be made arbitrary close to the optimal value in the... 

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17.01.2019, 11:00  –  Albert-Einstein-Institut, Raum 1.63
Seminar Geometry and Physics

An elementary introduction to MHD equations

Huali Zhang (AEI)

Magnetohydrodynamics (MHD) is the study of the dynamics and magnetic properties of electrically conducting fluids. In this talk, we will give a brief derivation of MHD equations, and also introduce... 

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16.01.2019, 11:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Eisenstein series and Selberg zeta function twisted by representations with non-expanding cusp monodromy

Ksenia Fedosova (Albert-Ludwigs-Universität Freiburg)

In this talk, we investigate the behavior of the Eisenstein series, or generalized eigenfunctions of the Laplace operator on hyperbolic surfaces. We twist them by a (possibly) non-unitary... 

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16.01. bis 16.01.2019, 16.00  –  Room 2.22

Model reduction in pharmacometrics

Undine Falkenhagen

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14.01.2019, 10:15  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Sharp phase transition for the Widom-Rowlinson model

Dr. Pierre Houdebert

The Widom-Rowlinson model is formally defined as two homogeneous Poisson point processes forbidding the points of different type to be too close. For this Gibbs model the question of uniqueness/... 

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14.01.2019, 15:15-16:45  –  Haus 9, Raum 0.13
SFB-Seminar

Deterministic Sequential Monte Carlo for non-Gaussian elliptic problems

Sangeetika Ruchi (Centrum Wiskunde & Informatica, Amsterdam)

Sequential Monte Carlo methods (SMC) are typically stochastic. Ensemble Transform Particle filter (ETPF) is a deterministic SMC method. It, however, still fails for strongly nonlinear problems, since... 

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11.01.2019, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Cyclic homology and cyclic operads

Niels Kowalzig (Università di Napoli Federico II)

In this talk, we will give an overview of how typical ingredients of cyclic homology theories and (algebraic) operads naturally appear when looking for (higher) brackets on certain cohomology groups,... 

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11.01.2019, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

Specification of the Near-Earth Space Environment using Data Assimilation Techniques

Ludger Scherliess (Utah State University)

Over the past decades physics-based data assimilation models have been used in many areas of science and engineering and have found extensive use in meteorology and oceanography. More recently, data... 

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10.01.2019, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Nonlinear statistical inverse problems with random observations

A04: Markus Reiß, Wilhelm Huisinga

Project A04

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

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10.01.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Komplexe Vektorbündel

Michael Jung

mehr erfahren

10.01.2019, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Causal variational principles and energy estimates for linearized fields

Felix Finster (Regensburg)

After a brief general introduction to causal fermion systems and causal variational principles, the concept of linearized fields is introduced. Formulating the Cauchy problem locally in so-called... 

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10.01.2019, 11:00  –  Albert-Einstein-Institut, Raum 1.63
Seminar Geometry and Physics

Asymptotically flat vacuum asymptotics: Things that remain to be done

Helmut Friedrich (AEI)

In the last 30 years an enormous amount of work has been done on the existence and global structure of asymptotically flat solutions to Einstein's field equations. Many of these contributions are in... 

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10.01.2019, 16:15  –  Free University of Berlin, Arnimallee 6, SR 025/026
Seminar "Topics in Geometric Analysis"

Joint Seminar

Piotr Bizoń, Niels Martin Møller

16:15Piotr BizońResonant dynamics in spatially confined Hamiltonian systems

The long-time behavior of nonlinear dispersive waves subject
to spatial confinement can be very rich and complex because,... 
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09.01.2019, 16:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

Neumann problems on graphs

Michael Schwarz

Abstract

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08.01.2019, 11:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

Fourier Integral Operators

Philipp Bartman, Sari Ghanem, Philip Thonke

11:00Philipp BartmanOscillatory Integrals
13:00Sari GhanemLocal Theory for Fourier Integral Operators
14:30Philip ThonkePseudodifferential Operators
15:30Oliver Lindblad-PetersenExample: Wave Equation
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07.01.2019, 16:15 - 17:45  –  Freie Universität, Takustr. 9 (Informatikgebäude), 14195 Berlin, großer Hörsaal
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

BeGREIFen des Integralbegriffs: Montessorische Lernmaterialien zur handlungs- und vorstellungsorientierten Erarbeitung der Integralrechnung

Annalisa Drösemeier, StRin, M. Ed. (Universität Bayreuth)

Die Integralrechnung zählt sicherlich zu den anspruchsvolleren Themengebieten der Schulmathematik. Nicht
selten beschränkt sich der Analysisunterricht dabei auf Formeln und Kalküle, die auswendig... 

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20.12.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Hindernistheorie

Claudia Grabs

mehr erfahren

19.12.2018, 16:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

Spectral asymptotics of Robin Laplacians on polygonal domains

Magda Khalile (Leibniz Universität Hannover)

Abstract

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19.12. bis 19.12.2018, 16.00  –  Room 2.22

Blood Cells and Differential Geometry

Alexander Friedrich

Blood cells and their iconic discoid shape can modelled by closed surfaces minimizing an associated bending energy. I will give a brief introduction to immersed surfaces and discuss what kind of... 

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19.12.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

A Rough Path Perspective on Renormalization

Rosa Preiss (TU Berlin)

This talk is based on a joint paper with Yvain Bruned, Ilya Chevyrev and Peter Friz. There, we revisit (higher-order) translation operators on rough paths, in both the geometric and branched setting.... 

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17.12.2018, 16:15 - 17:45  –  Universität Potsdam, Institut für Mathematik, Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Multimodal Algebra lernen - Einblicke in ein interdisziplinäres Technologieprojekt

Prof. Dr. Angelika Bikner-Ahsbahs (Universität Bremen)

Algebra gehört zum Schlüsselbereich mathematischen Arbeitens, der in der Sekundarstufe erlernt wird, aber
für alle weiterführenden Inhaltsbereiche mathematischen Handelns relevant ist. Dabei tun sich... 

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17.12.2018, 10:15  –  Golm, Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Parameter estimation for SPDEs based on discrete observation in time and space

Florian Hildebrandt (Hamburg)

Stochastic partial differential equations (SPDEs) are becoming increasingly popular for modeling phenomena from the natural sciences and finance and thus require statistical methods for their... 

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14.12.2018, 10:15-11:45  –  Haus 9, Raum 0.13
SFB-Seminar

Validity of linear response theory in high-dimensional deterministic dynamical systems

Caroline Wormell (University of Sydney and SFB visiting PhD research fellow)

Many physical problems, most importantly the quantification of climate change, involve estimating the response of a deterministic chaotic dynamical system's statistical equilibrium to perturbations... 

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13.12.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Ensemble Kalman filtering

A02: Wilhelm Stannat, Jana de Wiljes, Sebastian Reich

Project A02

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

13.12.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Die Euler-Klasse

Sebastian Hannes

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13.12.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Spacetime diffeomorphisms as matter fields

Dmitri Vassiliev (UCL London)

We work on a 4-manifold equipped with Lorentzian metric g and consider a volume-preserving diffeomorphism which is the unknown quantity of our mathematical model. The diffeomorphism defines a... 

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13.12.2018, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

The Berry Phase: Introduction and Examples

Lukas Böke (AEI - ETH)

The Berry phase was introduced by Michael Berry in the 80s, and a little later an elegant description in terms of holonomy was observed by Barry Simon. We introduce the Berry phase and the Berry-Simon... 

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13.12.2018, 16:15  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Topics in Geometric Analysis"

Joint Seminar

Felix Lubbe and Andreas Hermann

16:15-17:15Felix Lubbe
(Universität Hamburg)
A Stability result for Mean Curvature Flow in Lorentzian Manifolds
Given a Riemannian manifold M with bounded geometry, we consider its (graphical)
mean... 
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12.12.2018, 14:00 Uhr  –  Haus 9, Raum 2.22
Institutskolloquium

Mathematik & Geschlecht

Kerstin Palm (HU Berlin), Renate Tobies (Friedrich-Schiller-Universität, Jena)

14:00 Renate Tobies, Friedrich-Schiller-Universität, Jena

Klein, Hilbert und die Förderung von Frauen in der Mathematik, nebst zu überwindenden Problemen

Mit Felix Klein und David Hilbert entstand... 

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10.12.2018, 16:15 - 17:45  –  Universität Potsdam, Institut für Mathematik, Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Designing a gesture-based app to support multiplicative thinking: pedagogical issues, and early results

Prof. Dr. Nathalie Sinclair (Simon Fraser University, Kanada)

Multiplication is often taught as repeated addition, especially in the early years of school, which leads to challenges for students when they encounter situations in which they have to think... 

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08.12.2018, 10:00 Uhr  –  Haus 9
Schülerförderung

Schülerförderung 8.12.2018

Axel Brückner, Jan Metzger

Klasse 9/10: Dr. Axel Brückner: Kegelschnitte

Bei Kegelschnitten handelt es sich um ausgesprochen schöne geometrische Gebilde, die für die Lösung vieler technischer Probleme eine große Bedeutung... 

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07.12.2018, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Application of Hopf Algebras in the Renormalization of Gauge Theories

Henry Kißler (Humboldt-Universität zu Berlin)

The talk gives a broad overview about the Hopf-algebraic renormalization
of Gauge Theories. First, some basic facts about Hopf algebras and
perturbative Quantum Field Theory are recalled. Then, the Hopf... 

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07.12.2018, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

Piecewise-deterministic Markov chain Monte Carlo

Arnaud Doucet (Oxford University)

A novel class of continuous-time non-reversible Markov chain Monte Carlo (MCMC) based on piecewise-deterministic processes has recently emerged. In these algorithms, the state of the Markov process... 

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06.12.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Scene viewing - from basic models to tasks and individual differences

B05: Ralf Engbert, Tobias Scheffer

Project B05

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

06.12.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Eindeutigkeit der Stiefel-Whitney-Klassen

Andreas Hermann

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06.12.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Wave equations with initial data on compact Cauchy horizons

Oliver Lindblad Petersen (Hamburg)

I will present a new existence and uniqueness result for wave equations with initial data on compact Cauchy horizons. As an application, we prove that any vacuum spacetime containing a compact... 

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05.12.2018, 16:15 Uhr  –  Campus Golm, Haus 9, Raum
Forschungsseminar Diskrete Spektraltheorie

Inference of Phylogenetic Trees from Homology-Relations

Marc Hellmuth (Universität Greifswald)

Phylogenomics aims at finding plausible hypothesis about the evolutionary history of gene or species based on genomic sequence information. Genes are passed from generation to generation to the... 

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04.12.2018, 11:00  –  University of Hamburg, Geomatikum, Bundesstraße 55
Seminar "Nonlinear Wave Equations"

Fourier Integral Operators

Alexander Friedrich, Sari Ghanem, Felix Lubbe

11:00Alexander FriedrichWavefront Set 2, Room 127
13:30Sari GhanemSymbols, Room 1528
15:00Felix LubbeDistributions defined by Oscillatory Integrals, Room 1528
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30.11.2018, 10:15-11:00  –  Haus 9, Raum 0.14
SFB-Seminar

Neural Particle Filter and Beyond

Simone Surace (University of Zurich, ETH Zurich and University of Bern)

Perception can be seen as unconscious inference in a dynamically changing environment and formalized as nonlinear Bayesian filtering. A heuristic search for a scalable and biologically plausible... 

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30.11.2018, 11:00-11:45  –  Haus 9, Raum 0.14
SFB-Seminar

Hawkes Processes with Sigmoid Gaussian Excitations

César Ojeda (Fraunhofer Institute for Intelligent Analysis and Information Systems IAIS)

We propose a Hawkes point process model for point processes where the excitations are modulated via a Gaussian process prior with a sigmoid link function. This formulation allows for a rich and... 

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29.11.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Bayesian inference for cognitive models

B03: Ralf Engbert, Sebastian Reich

Project B03

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

29.11.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Universelle Bündel

Peter Grabs

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29.11.2018, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Radiation Memory

Jeff Winicour (University of Pittsburgh)

I will review results about linear and nonlinear radiation memory for electromagnetic and gravitational fields and present some new results for the collision of black holes.

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29.11.2018, 16:15  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Counter-intuitive existence and approximation results

Christian Bär

We will discuss a general approximation theorem which allows to solve overdetermined partial differential relations on an open dense subset of the domain. Let K be a real number. Applications will... 

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28.11.2018, 16:30 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

A Riesz' Decomposition Theorem for Schrödinger Operators On Graphs

Florian Fischer (Universität Potsdam)

In the classical potential theory on Euclidean space and in the potential theory of transient Markov chains a unique decomposition of superharmonic functions in a harmonic and a potential part is... 

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28.11.2018, 15:00  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

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26.11.2018, 10:15  –  Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Gaussian approximation for the small jumps of Lévy processes

Dr. Ester Mariucci

It is common practice to treat small jumps of a Lévy process as Wiener noise and thus to approximate their marginals by means of their corresponding Gaussian distributions.

However, results that allow... 

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26.11.2018, 16:15 - 17:45  –  Universität Potsdam, Institut für Mathematik, Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Natürlich diskret, aber beachte die Folgen – ein diskreter Zugang zu den Grundlagen der Analysis

Prof. Dr. Hans-Georg Weigand (Universität Würzburg)

Grenzwert- und Ableitungsbegriff sind zentrale Begriffe der Analysis. Die Diskussion um diese Begriffe durchzieht die gesamte Entwicklung der Mathematik und den Analysisunterricht in der Schule seit... 

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23.11.2018, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Hodge decomposition theorem and solvability of elliptical boundary value problem: a comparative study

Ihsane Malass (Uni Potsdam)

We start by discussing Hodge theory on closed manifolds and the solvability of the differential equation du=f for f a given differential form. We then discuss the solvability of such problems on... 

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22.11.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Cell motility: a showcase for data assimilation techniques

B02: Carsten Beta, Wilhelm Huisinga, Matthias Holschneider

Project B02

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

22.11.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Graßmann-Mannigfaltigkeiten

Saskia Roos

mehr erfahren

22.11.2018, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Introduction to the Wigner transform

Jérémie Joudioux (AEI)

The Wigner transform was introduced at the beginning of the 30s to understand quantum corrections to classical statistical mechanics. It has then been used in optics to perform analysis in phase space... 

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22.11.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

First-order elliptic boundary value problems for manifolds with non-compact boundary

Lashi Bandara

In this talk, I'll have a yarn about ongoing work on the question of BVPs for elliptic first-order BVPs where the boundary is non-compact, whenever the adapted operator on the boundary is essentially... 

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21.11.2018, 14:00 Uhr  –  Haus 9, Raum 2.22
Institutskolloquium

Urn models and random walks

Paolo Dai Pra (Università degli Studi di Padova), Pierre-Yves Louis (Université de Poitiers)

14:00 Part I
Popular urn models:interaction and synchronization

(Pierre-Yves Louis)

Urn models  have found several applications, from adaptive
... 

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19.11.2018, 12:15-12:45  –  Haus 9, Raum 2.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Der Phasenübergang im zufälligen Erdös-Rényi-Graphen

Stella-Isabell Schmidt

Interessenten sind herzlich eingeladen

Prof. Dr. Sylvie Roelly, Dr. Tania Kosenkova

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19.11. bis 12.12.2018
Veranstaltung der Fachschaft

Veranstaltungen der Fachschaft Mathematik/Physik

KiP Plätzchen backen - 11.12.2018, 18 Uhr - Küche vom Wohnheim Haus 7

Weihnachtsfeier - 12.12.2018, 18 Uhr - 2.28.0.102/104

mehr erfahren

17.11.2018, 10:00 Uhr  –  Haus 9
Schülerförderung

Schülerförderung 17.11.2018

Florian Fischer, Christian Scholz, Sylvie Roelly

Klasse 9/10: Florian Fischer / Christian Scholz: Wie viele Wächter braucht ein Museum?

Ein Museum beherbergt viele Kostbarkeiten und sollte dementsprechend gut bewacht werden. Jedoch ist es... 

mehr erfahren

16.11.2018, 10:15-11:00  –  Haus 9, Raum 0.14
SFB-Seminar

Hamiltonian Monte Carlo methods on Hilbert spaces

Jakiw Pidstrigach (University of Bonn)

When sampling measures on Hilbert spaces one option is to first discretize the space and then apply standard Markov Chain Monte Carlo methods. This works but the finer the discretization is, the... 

mehr erfahren

16.11.2018, 11:00-11:45  –  Haus 9, Raum 0.14
SFB-Seminar

A Causal approach to spring-to-summer climate variability in the Southern Hemisphere

Elena Saggioro (University of Reading, UK)

The coupling between stratospheric and tropospheric dynamics is currently a topic of major interest [1,2].  In the context of the Southern Hemisphere (SH) summertime, reanalysis data seem to... 

mehr erfahren

15.11.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Statistical modeling of earthquake occurence

B04: Gert Zöller, Matthias Holschneider

Project B04

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

15.11.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Erste Anwendungen von Stiefel-Whitney-Klassen

Sebastian Hannes

mehr erfahren

15.11.2018, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Helicity and spin in Maxwell theory and linearized gravity

Sajad Aghapour (Sharif University of Technology, Tehran, and AEI)

The classical definitions of helicity, spin and orbital angular momenta of the electromagnetic field in free space have been improved in recent years in theoretical optics, stimulated by experiments... 

mehr erfahren

15.11.2018, 16:15  –  Free University of Berlin, Arnimallee 6, SR 025/026
Seminar "Topics in Geometric Analysis"

Joint Seminar

Cezar Oniciuc, Thomas Körber

16:15Cezar Oniciuc
(Iași)
Biharmonic immersions in spheres
We present unique continuation results for biharmonic maps and then we review classification results for biharmonic hypersurfaces in Euclidean... 
mehr erfahren

14.11.2018, 16:15 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

Kato-type curvature conditions and the Cheeger constant

Christian Rose (Technische Universität Chemnitz)

We show that if the negative part of the Ricci curvature of a compact manifold is in the Kato-class, the Cheeger constant of the manifold can be bounded below by a positive constant. This is obtained... 

mehr erfahren

13.11.2018, 11:00  –  University of Potsdam, Campus Golm, Building 9
Seminar "Nonlinear Wave Equations"

Fourier Integral Operators

Jan Metzger, Oliver Lindblad, Klaus Kröncke

11:00Jan MetzgerIntroduction and Distribution Densities, Room 0.12
13:30Oliver LindbladThe Method of Stationary Phase, Room 2.22
15:00Klaus KrönckeWavefront Set 1, Room 2.22
mehr erfahren

12.11.2018, 16:15 - 17:45  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Der Känguru-Mathematikwettbewerb: Wie stellt man gute Aufgaben?

Peat Schmolke (Känguru-Wettbewerb)

Aufgaben sind ein integraler Bestandteil der Mathematik. Studium oder Grundschule, zu Hause oder im Unterricht, leicht oder schwer: Aufgaben fragen Gelerntes ab, motivieren eine neue Theorie oder... 

mehr erfahren

09.11.2018, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

Image-based modelling of problems in cell motility

Till Brettschneider (University of Warwick, UK)

Mathematical modelling has been key to understanding the mechanics of cell shapes and the theoretical principles behind the complex spatio-temporal biochemical regulation of directed cell motility.... 

mehr erfahren

08.11.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Nonparametric Bayes and Gaussian processes

A06: Manfred Opper, Vladimir Spokoiny

Project A06

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

08.11.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Axiomatische Einführung von Stiefel-Whitney-Klassen

Michael Jung

mehr erfahren

08.11.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Positivity of scalar Hadamard-bisolutions for the wave equation on globally hyperbolic Lorentzian manifolds

Max Lewandowski

Let W be a scalar Hadamard-bisolution for the wave equation on a globally hyperbolic Lorentzian manifold M, then positivity W[φ,φ]≥0 only affects the symmetric part Ws of W, which is essentially... 

mehr erfahren

08.11.2018, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Using the geometric optics approach to connect the Dirac equation to the linearised MPD equations

Lukas Böke (AEI)

We present a correspondence, established in papers by R. Rüdiger and J. Audretsch, between quantum mechanical equations of motion and classical equations of spinning massive particles in a... 

mehr erfahren

07.11.2018, 16:15 Uhr  –  Campus Golm, Haus 9, Raum 2.09.1.10
Forschungsseminar Diskrete Spektraltheorie

Shnol type theorem for the Agmon ground state - the discrete setting

Siegfried Beckus (Universität Potsdam)

The celebrated Shnol theorem asserts that every polynomially bounded generalized eigenfunction for a given energy E associated with a Schrödinger operator H implies that E is in the L2-spectrum of H.... 

mehr erfahren

07.11.2018, *10:00 Uhr*  –  Haus 9, *Raum 2.11*
Arbeitsgruppenseminar Analysis

Arborified zeta values and shuffle of trees

Pierre Clavier (Uni Potsdam)

Arborified zeta values (AZVs) are a generalisation to trees of Multizeta values. They can be defined through the branching of the Euler-MacLaurin operator. We will review this construction without... 

mehr erfahren

05.11. bis 09.11.2018  –  Potsdam
Studienreise

Besuch von Studierenden aus Tilburg

Koordination: Claudia-Susanne Günther

Teilnehmende:20 holländische Lehramtsstudierende und Dozenten, Potsdamer Lehramtsstudierende des Faches Mathematik
Programm:Besuch von Mathematikdidaktikseminaren, Hospitation im Mathematikunterricht... 
mehr erfahren

05.11.2018, 10:15  –  Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

A Large Deviations Approach to the Homogenization of Nonlocal PDEs

Dr. André de Oliveira Gomes

Homogenization theory studies, roughly speaking, the effects of high frequency oscillations on the coefficients of the solutions of partial differential equations (PDEs for short). In the simplest... 

mehr erfahren

01.11.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Konstruktion von Vektorbündeln

Claudia Grabs

mehr erfahren

01.11.2018, 11:00  –  Albert-Einstein-Institut, Raum 0.01
Seminar Geometry and Physics

Conservation laws for spinning fields

Lars Andersson

Noether's theorem states that for a Lagrangian field theory, symmetries of the action gives rise to conserved currents and charges. The most well-known symmetries are those which arise from Killing... 

mehr erfahren

01.11.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

The stability of Minkowski space as a solution to the Einstein-Vlasov system

Jérémie Joudioux (Radboud University and AEI)

We discuss in this talk the proof of the stability of Minkowski space as a solution to the Einstein-Vlasov system. This proof is based on the construction of appropriate commutators with the... 

mehr erfahren

01.11.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Data Assimilation in the Earth Van Allen Radiation Belts

B06: Yuri Shprits

Project B06

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

29.10.2018, 10:15  –  Haus 9, Raum 2.11
Forschungsseminar Wahrscheinlichkeitstheorie

Statistical inference with optimal transport

Dr. Alexandra Suvorikova

Optimal transportation (OT) theory provides a powerful toolbox for data analysis in nonlinear spaces, where nonlinearity appears as an inevitable consequence of complexity of objects of interest (e.g.... 

mehr erfahren

26.10.2018, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

The Tunneling Effect for Schrödinger operators on vector bundles

Elke Rosenberger (UP)

The well known theory of the Tunneling Effect for Schrödinger Operators with multi well potential can be generalized to operators acting on smooth sections of a vector bundle over a Riemannian... 

mehr erfahren

25.10.2018, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Einführung in Vektorbündel

Peter Grabs

mehr erfahren

25.10.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Bandits

A03: Alexandra Carpentier

Project A03

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

24.10.2018, 14:00 Uhr  –  Haus 9, Raum 2.22
Institutskolloquium

Mathematical models of living tissues

Anna Marciniak-Czochra (Universität Heidelberg), Marie Doumic (Inria, CNRS and Sorbonne Université, Paris)

14:00 Marie Doumic: Modelling protein polymerisation: results and open questions
15:00 Tea and Coffee break
15:30 Anna Marciniak-Czochra: Mathematics of stem cells

Abstracts:

Marie Doumic: Modelling... 

mehr erfahren

19.10.2018, 14:00  –  Raum 2.22
Verteidigung der Masterarbeit / Defence of the Master's thesis

Der Curl-Operator auf sphärischen Raumformen und isospektrale Beispiele

Jonas Rungenhagen

 

mehr erfahren

18.10.2018, 10:15  –  Haus 9, Raum 0.12
Forschungsseminar Wahrscheinlichkeitstheorie

Quasi-stationarity for one-dimensional renormalized Brownian motion

William Oçafrain

The goal is to approximate the law of a one-dimensional Brownian motion
conditioned not to cross fleeing boundaries when the time is big enough. To do so,
we will study the quasi-stationarity of the... 

mehr erfahren

18.10.2018, 14:15-17:45  –  Räume 2.14.0.47 und 2.28.0.108
Ringvorlesung Interdisziplinäre Mathematik

Poisson Point Processes

A05: Sylvie Roelly, Alexander Zass

Project A05

14:15-15:45 in Room 2.14.0.47
16:15-17:45 in Room 2.28.0.108

Exercises take place Mondays from 16:15-17:45 at 2.25.F0.01.

mehr erfahren

17.10.2018, 14:00 Uhr  –  Raum 2.09.2.22
Verteidigung der Dissertation / Defence of the PhD thesis

On the characterization of particular orthogroups by disjunctions of identities

Alexander Jende

mehr erfahren

15.10.2018, 12:15 Uhr  –  Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Boundary Value Problems on Manifolds with Singularities

Sara Ali Ahmad Khalil

mehr erfahren

12.10.2018, 10:15-11:45  –  Haus 9, Raum 0.12
SFB-Seminar

Integrated approaches to investigate reactive transport processes in soil and groundwater

Irina Engelhardt (TU Berlin)

The presentation gives an overview about experimental and numerical approaches to analyze reactive transport processes in soils and groundwater. Examples of laboratory experiments, lysimeter and... 

mehr erfahren

10.10.2018, 10:15  –  Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Gibbsian representation for point processes via hyperedge potentials

Benedikt Jahnel (WIAS)

Abstract: We consider marked point processes on the d-dimensional euclidean space, defined in terms of a quasilocal specification based on marked Poisson point processes. We investigate the... 

mehr erfahren

08.10.2018, ab 18 Uhr  –  Innenhof von Haus 28
Veranstaltung der Fachschaft

Ersti-Grillen

FSR MaPhy

Der FSR MaPhy lädt alle StudienanfängerInnen zu einem gemeinsamen Grillabend ein. Auch Studierende höherer Semester und Lehrende sind herzlich willkommen.

mehr erfahren

05.10.2018, 9:30  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Eilenberg's extension of algebras and noncommutative geometric standard model of particles

Christian Brouder (IMPMC, Paris VI)

mehr erfahren

04.10.2018, 10:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Locality in perturbative algebraic quantum field theory

Kasia Rejzner (University of York)

In this talk I will give an overview of perturbative algebraic quantum field theory (pAQFT), which is a mathematically rigorous framework to study perturbative QFT. In particular, I will focus on... 

mehr erfahren

01.10.2018, 9:00  –  Campus Golm, Haus 12, Raum 0.01
Informationsveranstaltung

Einführungsveranstaltung Mathematik Bachelor of Science und Bachelor of Education

Diese Einführungsveranstaltung richtet sich an alle Anfängerinnen und Anfänger der Studiengänge Mathematik Bachelor of Science und Bachelor of Education. Die Institutsleitung, die Lehrkräfte der... 

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13.09.2018, 16:15  –  Haus 9, Raum 2.22
Forschungsseminar Differentialgeometrie

Eigenvalue asymptotic for weighted Laplacians on rough Riemannian manifolds with boundary

Medet Nursultanov

 We investigate an asymptotic of the eigenvalues of the of the indefinite-weighted Laplace equation, $\Delta u = \lambda P u$, on the Riemannian manifold equipped with a rough metric. Namely, for the... 

mehr erfahren

11.09.2018, 11h00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

A survey of Wiles' proof of Fermat's Last Theorem

Filippo Nuccio (IUT and Institut Camille Jordan, Université de Saint-Étienne)

This will be a colloquium-style talk aimed at presenting to a non-specialist audience the main ideas beneath Wiles' proof of Fermat's Last Theorem (Ann. of Math, 1995). I will first introduce Frey's... 

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24.08.2018, 10:15-11:45  –  Campus Golm, Haus 27, Raum 0.01
SFB-Kolloquium

1st Kalman Lecture of the SFB: The Legacy of Rudolph Kalman

Andrew Stuart (California Institute of Technology, USA)

In 1960 Rudolph Kalman published what is arguably the first paper to develop a systematic, principled approach to the use of data to improve the predictive capability of mathematical models. As our... 

mehr erfahren

20.07.2018, 10:30  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Linking Lie groupoids and infinite-dimensional Lie theory

Alexander Schmeding (TU Berlin)

Lie groupoids generalise Lie groups and the associated Lie
theory to regimes with symmetries which are not necessarily global in
nature (in the sense of being not induced by a Lie group action). It
is... 

mehr erfahren

20.07. bis 20.09.2018  –  Campus Am Neuen Palais, Haus 19
Workshop

Workshops zum Schreiben und Präsentieren

Das Zentrum für Sprachen und Schlüsselkompetenzen (Zessko) bietet während der Semesterferien zahlreiche Workshops zu den Themen Schreiben und Präsentieren an. In der Schreibwerkstatt wird das... 

mehr erfahren

19.07.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

The kernel of the Rarita-Schwinger operator on Riemannian spin manifolds

Uwe Semmelmann (Stuttgart)

The Rarita-Schwinger operator is a twisted Dirac operator. It has several  interesting applications in physics and differential geometry. In my talk I will introduce this operator, give some of its... 

mehr erfahren

18.07.2018, 14.00-16.30  –  Room 2.22
Doktorandentag

Math Ph.D. Day

Sebastian Hannes, Florian Fischer, Claudia Grabs and Corinna Maier

On this years Math Ph.D. Day we are proud to have four speakers from our institute. They will take us on a tour from Geometric Analysis over Graph Theory to System Biology.

 

14.00 - 14.30:... 

mehr erfahren

18.07.2018, 12:30-13:45  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

16.07.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

How close are two Lévy(-type) processes?

Tania Kosenkova

Lévy(-type) processes arise naturally as models of a (state dependent) jump behaviour in a wide variety of situations in natural sciences and finance. The topic of this talk is induced by the need to... 

mehr erfahren

16.07.2018, 17:15-18:15  –  Haus 9, Raum 2.22
Forschungsseminar Wahrscheinlichkeitstheorie

Entropic and optimal transport

Christian Léonard (Paris)

The Schrödinger problem is an entropy minimization problem on a set of  path measures with prescribed initial and final marginals. It arises  from a large deviation principle for the empirical... 

mehr erfahren

13.07.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

The Kapustin-Witten Equations

Chandrashekar Devchand (MPI, Golm)

Recent papers by  Uhlenbeck and  Taubes have raised expectations that the field theory equations discussed by Kapustin and Witten in 2006 have a significance for  complex four-manifolds analogous to... 

mehr erfahren

13.07.2018, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

A review of the Epidemic Type Aftershock Sequences (ETAS) model: 30 years of modeling seismicity

Maximilian Werner (University of Bristol, UK)

Earthquakes seldom come alone. They occur in temporal and spatial clusters, occasionally preceded by foreshocks, always followed by aftershocks, and sometimes they occur in complex multi-mainshock... 

mehr erfahren

13.07.2018, 14:00  –  Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Analysis of the Teukolsky equations on slowly rotating Kerr spacetimes

Siyuan Ma

 

mehr erfahren

13.07.2018, 16:00  –  Haus 10, Raum 0.25
Verteidigung der Dissertation / Defence of the PhD thesis

The role of Trapping in Black Hole Spacetimes

Claudio Paganini

 

mehr erfahren

12.07.2018, 16:15  –  Haus 9, Raum 2.09.0.14
Forschungsseminar Wahrscheinlichkeitstheorie

Random dynamics for hard spheres

Myriam Fradon (Lille)

What is the closest packing for a finite number of non-overlapping  spheres with equal radius ? The answer to this apparently simple  question in only known for very small systems, despite the... 

mehr erfahren

12.07.2018, 16:00  –  Neues Palais, House 12, Room 0.39
Öffentlicher Vortrag

Science at Risk - Scholars at Work

Refugee academics present their scientific work and research in a multidisciplinary lecture series.

19 April: Opening: Screening of the documentary "Science in Exile" by Nicole Leghissa (The World... 

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12.07.2018, 16:15  –  Free University of Berlin, Arnimallee 6, SR 025/026
Seminar "Topics in Geometric Analysis"

Joint Seminar

Nikolaos Roides; Adrian Spener

16:15 Nikolaos Roidos
(Hannover)
Conic manifolds under the Yamabe flow

We consider the unnormalized Yamabe flow on manifolds with conical singularities. Under certain geometric assumption on the... 

mehr erfahren

12.07.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

The Yamabe problem on Lorentzian manifolds

Viktoria Rothe

 In this talk we will consider the Yamabe equation on 4-dimensional globally hyperbolic Lorentzian manifolds. We will discuss some different approaches how one could get a positive global solution to... 

mehr erfahren

11.07.2018, 14.00  –  Haus 9, Raum 2.22
Institutskolloquium

Statistics in interactions with other fields of mathematics

Marc Hoffmann (Univ. Paris-Dauphine), Guillaume Sagnol (TU Berlin)

14:00 Marc Hoffmann (Univ. Paris-Dauphine): Age-structured model in a large population: combining a statistical analysis and PDEs
15:00 Tea and Coffee break
15:30 Guillaume Sagnol (TU Berlin):... 

mehr erfahren

11.07.2018, 17:00  –  Campus Golm, Haus 28/29
Institutsveranstaltung

Absolventenfeier 2018 und Institutsfest

17:00 Uhr: Absolventenfeier (Haus 29)
18:00 Uhr: Institutsfest (Innenhof Haus 28)

mehr erfahren

09.07.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Resonances

Markus Klein

TBA

mehr erfahren

06.07.2018, 10:15-11:45  –  Haus 9, Raum 0.13
SFB-Seminar

Balancing robustness and accuracy in high resolution hydrological models

Sabine Attinger (Universität Potsdam)

Anthropogenic warming is anticipated to impact the hydrological cycle tremendously in the future. However, projections are accompanied by large uncertainty due to varying estimates of future warming... 

mehr erfahren

06.07.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Index Theory and the essential spectrum

Alan Carey (ANU, Adelaide)

In condensed matter theory physicists have speculated on the relationshipbetween spectral flow and the Fredholm index in situations where the operators in question have essential spectrum and may... 

mehr erfahren

05.07.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Linearized elastic shell theory

Claudia Grabs

The total elastic energy is an extrinsic geometric functional for an embedding of some body manifold into an ambient space. We want to compute the first and second variation of this extrinsic... 

mehr erfahren

02.07.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Forschung der AG Mathematische Physik I

Elke Rosenberger

TBA

mehr erfahren

29.06.2018, 10:30 uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Nonlocal Quantum Effective Actions and Weyl Anomalies

Teresa Bautista (Max Planck Institute for Gravitational Physics, Golm)

The quantum effective action is a functional of the matter and gauge fields of a theory. It is a powerful object because the full quantum physics of the theory can be derived from it by doing simple... 

mehr erfahren

28.06.2018, 16:15  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Topics in Geometric Analysis"

Joint Seminar

Yuxin Ge and Lorenzo Mazzieri

16:15  
 
Yuxin Ge     
(Toulouse)
Compactness of conformally compact Einstein manifolds in dimension 4

We show some compactness result of 4-dimensional conformally compact Einstein manifolds under the... 
mehr erfahren

25.06.2018, 16:15  –  Universität Potsdam, Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Nutzungsweisen von Grundschulkindern bei der Verwendung von Tablet-Apps

Dr. Daniel Walter (TU Dortmund)

Der Einsatz von Tablet-Apps im Grundschulunterricht stellt ein äußerst kontrovers diskutiertes und von der Mathematikdidaktik zugleich vernachlässigtes Forschungsfeld dar. Weitgehend unergründet ist... 

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22.06.2018, 11:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

The Characteristic Cauchy Problem

Sari Ghanem, Klaus Kroencke, Philip Thonke

TBA

mehr erfahren

22.06.2018, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

Numerical Methods in Visual Computing: what we can learn from each other

Uri Ascher (UBC Vancouver)

Visual computing is a wide area that includes computer graphics and image processing, where the “eyeball-norm” rules. I will discuss two case studies involving numerical methods and analysis applied... 

mehr erfahren

20.06.2018, 14:00  –  Haus 9, Raum 2.22
Institutskolloquium

Bridges between symplectic geometry and combinatorics of polytopes

Silvia Sabatini, Milena Pabiniak (Uni Köln)

14:00 Silvia Sabatini (Köln): 12, 24 and beyond: A bridge from reflexive Polytopes to symplectic Geometry
15:00 Tea and Coffee break
15:30 Milena Pabiniak (Köln): How to distinguish between symplectic... 

mehr erfahren

18.06.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Non classical analysis: from rough paths to regularity structures

Youness Boutaib

TBA

mehr erfahren

18.06.2018, 16:15  –  Universität Potsdam, Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Tätigkeitstheorie und kulturhistorische Didaktik

Prof. Dr. Hartmut Giest (Universität Potsdam)

In vielen aktuellen Arbeiten zur Lehr-Lern-Forschung wird der Bezug zu Vygotskij (vor allem mit Blick auf das Konzept der Zone der nächsten Entwicklung) hergestellt. Dennoch sind – nicht nur... 

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14.06.2018, 16:00  –  Haus 9, Raum 2.09.0.14
Forschungsseminar Wahrscheinlichkeitstheorie

Overview on stochastic models, McKean-Vlasov dynamics and their applications.

Jean-Francois Jabir (Moskau)

Abstract: This seminar aims to give a broad and straightforward presentation on fundamental aspects related to the theory and application of continuous-time stochastic ... 

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14.06.2018, 16:15  –  Free University of Berlin, Arnimallee 6, SR 025/026
Seminar "Topics in Geometric Analysis"

Joint Seminar

Andreas Gastel and Olaf Müller

16:15  
  
Andreas Gastel
(Duisburg)   
p-harmonic maps and Cosserat elasticity

For minimizers in a geometrically nonlinear
Cosserat model for micropolar elasticity of continua, we prove interior... 
mehr erfahren

14.06.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Outermost apparent horizons with non-trivial topology

Mattias Dahl

It is a well known fact that outermost apparent horizons must allow metrics of positive scalar curvature. It is conceivable that this is also the only restriction on a bounding manifold to be an... 

mehr erfahren

13.06.2018, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

11.06.2018, 16:15  –  Universität Potsdam, Campus Golm, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Together We’re Strong – Parallelisiertes Rechnen in der Mathematik-Visualisierung

Prof. Dr. Jürgen Richter-Gebert (TU München)

“Viele Hände machen ein schnelles Ende” pflegte meine Großmutter zu sagen, wenn es ans Abwaschen ging. Dieser Grundsatz des Parallelprocessing gilt ebenso, wenn man Berechnungen auf die Graphikkarte... 

mehr erfahren

08.06.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Rigidity of secondary invariants via equivariant coarse geometry

Indrava Roy (IMSc Chennai, zZ. Potsdam)

We describe how equivariant coarse geometry is employed in the study of rigidity properties of secondary invariants of Dirac operators for a Galois covering. We shall also discuss generalizations of... 

mehr erfahren

04.06.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Finite- and infinite-dimensional random dynamics and their equilibrium states

Sylvie Roelly

We first consider random diffusions with geometrical constraints and the problem of their convergence towards stationary states. Then we extend the framework to infinitely many interacting diffusions.... 

mehr erfahren

04.06.2018, 16:15  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Aspects of automated observation of dynamic constructions

Dr. Zlatan Magajna (Universität Ljubljana)

The use of dynamic geometry systems in school geometry affects working practices in this subject. Several processes, e.g. executing constructions and measurements, checking properties, simulating, and... 

mehr erfahren

01.06.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Baum-Connes conjecture, coarse geometry, and secondary invariants

Indrava Roy (IMSc Chennai, zZ Potsdam)

The Baum-Connes conjecture arises out of index theory and has deep consequences in geometric topology as well as analysis. Coarse geometry also seeks to capture index theoretic information in the... 

mehr erfahren

01.06.2018, 10:15-11:45  –  Haus 9, Raum 0.13
SFB-Seminar

Measures for diffusion, ergodicity & ageing

Ralph Metzler (Universität Potsdam)

After a short introduction into the history of Brownian motion I will present the stochastic motion in several physical systems, in particular with respect to the typically measured quantities & how... 

mehr erfahren

31.05.2018, 10:15-11:45  –  Campus 2 Haus 27 Raum 0.29/30
Forschungsseminar Wahrscheinlichkeitstheorie

A stochastic model for population evolution with genocide incidence

Samuel Sindayigaya (Kigali)

Abstrasct:

We study Birth-Death-Immigration-Emigration (BDIE) Processes with genocide incidence via their probability generating functions. The influence of genocide incidence, as a partial... 

mehr erfahren

31.05.2018, 16:15
Forschungsseminar Differentialgeometrie

First-order elliptic boundary value problems beyond self-adjoint induced boundary operators

Lashi Bandara

The Bär-Ballmann framework is a comprehensive framework for considering elliptic boundary value problems for first-order elliptic operators on manifolds with compact and smooth boundary, provided... 

mehr erfahren

28.05.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Locality and renormalisation

Sylvie Paycha

TBA

mehr erfahren

28.05.2018, 16:15  –  Freie Universität, Takustr. 9 (Informatikgebäude), 14195 Berlin, großer Hörsaal
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Wie Gebärdensprache mathematische Denk- und Lernprozesse beeinflusst – und was wir daraus lernen können

Dr. Christina Krause (Universität Duisburg-Essen)

Wie lernen gehörlose Schülerinnen und Schüler Mathematik? Wie konzeptualisieren sie mathematische Ideen? Welche Rolle spielt Gebärdensprache dabei? Und wie kann die Beantwortung dieser Fragen uns... 

mehr erfahren

25.05.2018, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

Approximate Kernel Embeddings of Distributions

Dino Sejdinovic (University of Oxford, UK)

Kernel embeddings of distributions and the Maximum Mean Discrepancy (MMD), the resulting probability metric, are useful tools for fully nonparametric hypothesis testing and for learning on... 

mehr erfahren

25.05.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Higher brackets on cyclic and negative cyclic (co)homology

Niels Kowalzig (Università di Napoli Federico II)

In this talk, we will embed the degree -d bracket on the equivariant homology of loop spaces developed by Chas-Sullivan and Menichi on negative cyclic cohomology groups as well as the dual bracket... 

mehr erfahren

25.05.2018, 11:00  –  University of Hamburg, Geomatikum, Bundesstraße 55
Seminar "Nonlinear Wave Equations"

The Characteristic Cauchy Problem

Jan Metzger, Felix Lubbe, Oliver Lindblad

11:00Jan Metzger (Potsdam)The Cauchy Problem in General Relativity 2
14:00Felix Lubbe (Hamburg)Null Geometry 2
15:30Oliver Lindblad (Potsdam)Randall's Approach to the characteristic Problem 2
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24.05.2018, 16:15  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Topics in Geometric Analysis"

Joint Seminar

Tobias Marxen and Volker Branding

16:15  
       
Tobias Marxen
(Oldenburg)
Ricci Flow on Warped Product Manifolds    
                     

The Ricci flow has become famous via the solution of Thurston's
geometrization conjecture and... 

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24.05.2018, 16:15
Forschungsseminar Wahrscheinlichkeitstheorie

Bandit problems

Pierre Ménard

First Talk

Title: An introduction to best arm identification in the bandit problems

Abstract: In this talk we will introduce the bandit setting and in particular the problem of best arm... 

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24.05.2018, 16:00 bis 19:00  –  2.09.0.12
Workshop

Begegnungen mit Mathematik – Workshop zu Mathelust und Mathefrust

Claudia-Susanne Günther, Peter Klöpping, Karen Reitz-Koncebovski

Anmeldung: Bei Interesse melden Sie sich bitte bis zum 17. Mai an unter karen.reitz-koncebovski@uni-potsdam.de

Wie ist Ihnen Mathematik bisher begegnet? Wie begegnen Sie ihr heute? Kann Ihnen die... 

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23.05.2018, 14:00  –  Haus 9, Raum 2.22
Institutskolloquium

Zeta functions everywhere!

Pierrette und Philippe Cassou-Noguès (University of Bordeaux)

14:00: Philippe Cassou-Nogues (Bordeaux): Zeta functions and Galois module structures.
15:00: Tea and Coffee break
15:30: Pierrette Cassou-Nogues (Bordeaux): Zeta functions and roots of Bernstein... 

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23.05.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Discrete group actions and a weak form of the Baum--Connes conjecture

Sara Azzali (Uni Potsdam)

The Baum--Connes conjecture can be seen as a far reaching generalisation of the Atiyah--Singer index theorem. Given a locally compact group G, the conjecture predicts an isomorphisms between a... 

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17.05.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Boundary Value Problems for the Lorentzian Dirac Operator

Sebastian Hannes (Potsdam)

We will discuss some progress and some failures in the treatment of (Pseudo-)local boundary conditions for the Lorentzian Dirac operator on a globally hyperbolic spacetime.

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14.05.2018, 16:15  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Welches Verständnis der Ableitung benötigen Studierende der Wirtschaftswissenschaften?

Frank Feudel (Humboldt-Universität zu Berlin)

Viele Schüler werden später als Studierende erneut mit Mathematik konfrontiert. Dies gilt nicht nur für die Studierenden der MINT-Studiengänge, sondern auch die Studierenden der... 

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14.05.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Improving Hardy's inequality

Matthias Keller

About 100 years ago Hardy proved his famous inequality. Since then such inequalities have been proven in various contexts. We address the question of not only proving a sharp constant but also the... 

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11.05.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Varieties, Signature Tensors, Rough Paths

Peter Friz (TU and WIAS, Berlin)

The signature of a parametric curve is a sequence of tensors whose entries are iterated integrals. This construction is central to the theory of rough paths in stochastic analysis. It is here examined... 

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07.05.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

How to plant a bubble tree

Alexander Friedrich

TBA

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05.05.2018, 13:00-20:00  –  Campus Golm, Haus 28, Foyer rechts und Raum 0.104
Institutsveranstaltung

Potsdamer Tag der Wissenschaften 2018

Der Potsdamer Tag der Wissenschaften 2018 findet dieses Jahr auf dem Campus Golm statt. Auch das Institut für Mathematik ist vertreten. Versuchen Sie sich im Programmieren mit den Robotern Dash und... 

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04.05.2018, 14:00  –  Auditorium maximum, Am Neuen Palais
Institutsveranstaltung

Euler-Vorlesung: Sailing Through Data: Discoveries and Mirages

Emmanuel Candès (Stanford University)

Programm:

  1. Prof. Peter Ullrich (U Koblenz-Landau): Berlin 1828-1855: "von dem anderen Dirichletschen Prinzipe [...] datiert die Neuzeit in der Geschichte der Mathematik"
  2. Prof. Emmanuel Candès (Stanford... 
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04.05.2018, 11:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

The Characteristic Cauchy Problem

Alexander Friedrich, Jan Metzger, Florian Hanisch

11:00Alexander FriedrichNull Geometry 1
13:30Jan MetzgerThe Cauchy Problem in General Relativity 1
15:00Florian HanischRandall's Approach to the characteristic Problem 2
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03.05.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Gromov’s weak flexibility lemma

Bernhard Hanke (Augsburg)

Jet bundles and partial differential relations allow a coordinate free characterisation of many topological and geometric structures, including immersions and submersions, symplectic and contact... 

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03.05.2018, 16:15  –  Haus 9, Raum 2.09.0.14
Forschungsseminar Wahrscheinlichkeitstheorie

Thermodynamic limit and phase transitions in non-cooperative games: some mean-field examples.

Paolo Dai Pra (Padova)

Abstract:

In stochastic dynamics inspired by Statistical Mechanics the interaction between different particles, or agents, is usually expressed as a given... 

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02.05.2018, 14:30 Uhr  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

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30.04.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Variational Problems in Extrinsic Geometry Part I: The Isoperimetric Problem

Jan Metzger

TBA

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27.04.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

The spectral Flow of a family of Toeplitz operators

Maxim Braverman (Northeastern University)

We show that the (gr