Veranstaltungsarchiv

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... 

mehr erfahren

01.06.2023, 16:00  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Introduction to Fréchet Manifolds V

NN

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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 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 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... 

mehr erfahren

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... 

mehr erfahren

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 aller Welt

(English? click here) (Flyer der Veranstaltung)

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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. 
... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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"... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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:... 

mehr erfahren

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.... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 
mehr erfahren

13.09. bis 14.09.2022  –  Campus Griebnitzsee, Building 6
SFB 1294 - Annual Meeting

SFB Annual Meeting

tba

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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
... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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):... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

17.02.2022, 16:15  –  Online via zoom
Seminar Geometrie

Gromov’s cube conjecture II

Artem Nepechiy

Zoom link available at this moodle.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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)

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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/... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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 \((M,g)\) -... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

13.01.2022, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

The long neck principle

Rubens Longhi

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

09.12.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Spectral estimates for Callias operators

Alberto Richtsfeld

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

25.11.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Index theory for relative Dirac bundles

Jonas Rungenhagen

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

18.11.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Relative Dirac bundles

Penelope Gehring

mehr erfahren

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... 

mehr erfahren

17.11.2021, 15 Uhr  –  Zoom
Institutsrat

Institutsratssitzung

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

11.11.2021, 16:15  –  Online via Zoom
Seminar Geometrie

The classical Dirac operator

Helge Frerichs

Zoom link available at this moodle.

mehr erfahren

10.11.2021, 13:30 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Characterizations of Forman curvature

Florentin Münch

mehr erfahren

10.11.2021, 13:30 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Characterizations of Forman curvature

Florentin Münch (MPI Leipzig)

mehr erfahren

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... 

mehr erfahren

09.11.2021, 10:00  –  Campus Golm, Haus 9, Raum 2.22
Forschungsseminar Statistik

Epsilon Best Arm Identification in Spectral Bandits

Dr. Tomáš Kocák

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

04.11.2021, 16:15  –  Raum 2.9.0.12
Seminar Geometrie

Clifford bundles and Dirac operators

Marten Steuer

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.
... 

mehr erfahren

27.10.2021, 10 Uhr  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Dynamical systems with pure point spectrum

Daniel Lenz (Jena)

mehr erfahren

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... 

mehr erfahren

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)

mehr erfahren

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... 

mehr erfahren

20.10.2021, 15 Uhr  –  Zoom
Institutsrat

Institutsratssitzung

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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)

mehr erfahren

13.10.2021, 17:30 Uhr
Institutsveranstaltung

Antrittsvorlesung Prof. Myfanwy Evans

Porf. Myfanwy Evans

Interdisziplinäre Vielfalt von "Tangling"

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

01.10.2021, 10:15 - 11:15  –  2.14.0.21
SFB-Seminar

Lassi Roininen

Lassi Roininen, Technische Universität Lappeenranta, Finland

tba

mehr erfahren

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... 

mehr erfahren

22.09.2021, 15 Uhr  –  Zoom
Institutsrat

Institutsratssitzung

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

19.05.2021, 15:00  –  Zoom
Institutsrat

Institutsratssitzung

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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.
... 

mehr erfahren

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... 

mehr erfahren

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)... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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  ... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

15.10.2020, 09:15  –  Campus Golm, Haus 9, Raum 0.12
Verteidigung der Masterarbeit / Defence of the Master 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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

24.09.2020, 14:00  –  Zoom-Meeting
Verteidigung der Masterarbeit / Defence of the Master thesis

Die isoperimetrische Ungleichung und ihre Verallgemeinerungen

Karsten Hansch

Interessenten schreiben für die Zoom-Zugangsdaten bitte eine E-Mail an cbaer@uni-potsdam.de

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

16.07.2020, 15:30  –  Webinar
Forschungsseminar Wahrscheinlichkeitstheorie

Modelization of Covid 19 by multitype branching processes

Andrea Hübner

Master thesis

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

08.06.2020, 11:45  –  Webinar
Forschungsseminar Wahrscheinlichkeitstheorie

The (neural network) Hopfield Model applied to decision making in behavioural science

Anne Flöge (Potsdam)

TBA

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

15.05.2020, 14:00  –  Auditorium Maximum, Haus 8, Am Neuen Palais
Öffentlicher Vortrag

Euler-Vorlesung 2020

Fernando Codá Marques

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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+... 

mehr erfahren

06.04.2020, 14:00  –  Virtual meeting via zoom, see link below
Verteidigung der Masterarbeit / Defence of the Master thesis

Characteristic classes in computer algeba

Michael Jung

Link to virtual meeting room: https://us04web.zoom.us/j/908168941?pwd=VGs0Z2FPM1Fza1FEbVQzNFJxelUzQT09

mehr erfahren

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... 
mehr erfahren

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,... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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>... 

mehr erfahren

03.02.2020, 16:00  –  Haus 9, Raum 2.22
Oberseminar Analysis, Geometrie, Physik

The Prime Number Theorem

Sylvie Paycha

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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 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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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)... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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 =... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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 thesis

Generalized Birth-and-Death Processes

Jens Fischer

Verteidigung der Masterarbeit im Rahmen der Wahrscheinlichkeitstheorie.

Gutachterinnen: Prof. Roelly und Dr. Kosenkova

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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 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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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 ... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 
mehr erfahren

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... 

mehr erfahren

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

...  mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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
mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

24.04.2019, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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... 

mehr erfahren

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
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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)

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 
mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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

 

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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.

mehr erfahren

14.02.2019, 14:00 - 17:00  –  Haus 9, Raum 2.22
Doktorandentag

PhD Day

PhD Day of the Institute of Mathematics

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

07.02.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Multiplikative Sequenzen 2

Andreas Hermann

mehr erfahren

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... 
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

31.01.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Multiplikative Sequenzen 1

Andreas Hermann

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

30.01.2019, 14:30  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

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
mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

17.01.2019, 14:15  –  Haus 9, Raum 0.14
Seminar Geometrie

Charakteristische Klassen: Die Chern-Klassen

Lashi Bandara

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

16.01. bis 16.01.2019, 16.00  –  Room 2.22

Model reduction in pharmacometrics

Undine Falkenhagen

mehr erfahren

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/... 

mehr erfahren

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... 

mehr erfahren

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,... 

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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,... 
mehr erfahren

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

mehr erfahren

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
mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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.... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

28.11.2018, 15:00  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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
... 

mehr erfahren

19.11.2018, 12:15-12:45  –  Haus 9, Raum 2.22
Verteidigung der Masterarbeit / Defence of the Master thesis

Der Phasenübergang im zufälligen Erdös-Rényi-Graphen

Stella-Isabell Schmidt

Interessenten sind herzlich eingeladen

Prof. Dr. Sylvie Roelly, Dr. Tania Kosenkova

mehr erfahren

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 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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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 ... 

mehr erfahren

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
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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.

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

07.05.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

How to plant a bubble tree

Alexander Friedrich

TBA

mehr erfahren

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... 

mehr erfahren

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... 
mehr erfahren

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
mehr erfahren

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... 

mehr erfahren

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... 

mehr erfahren

02.05.2018, 14:30 Uhr  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

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

mehr erfahren

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 (graded) spectral flow of a family of Toeplitz operators on a complete Riemannian manifold is equal to the index of a certain Callias-type operator. When the dimension of the manifold... 

mehr erfahren

27.04.2018, 10:15-11:45  –  Haus 28, Raum 0.108
SFB-Kolloquium

On periodic signals in stochastic Hodgkin-Huxley models

Reinhard Höpfner, Universität Mainz

We consider a stochastic Hodgkin-Huxley model where dendritic input –modelled as an autonomous SDE which depends on a deterministic T-periodic signal t→S(t) encoded in its drift– is the only source of... 

mehr erfahren

26.04.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

The Atiyah-Patodi-Singer index on manifolds with non-compact boundary

Maxim Braverman (Northeastern Univ., Boston, USA)

We study the index of the APS boundary value problem for a strongly Callias-type operator D on a complete Riemannian manifold M. We use this index to define the relative eta-invariant of two strongly... 

mehr erfahren

26.04.2018, 16:15  –  Haus 9, Raum 2.09.014
Forschungsseminar Wahrscheinlichkeitstheorie

The First Exit Time Problem in the small noise limit

André de Oliveira Gomes

It is our intention to describe the first exit time problem for an ordinary differential equation (ODE) perturbed by additive noise. We consider a dynamical system described by the ODE <tex>$\dot X_t=... 

mehr erfahren

26.04.2018, ab 15:00 Uhr  –  Campus Golm, Haus 25, Raum F.0.01
Institutsveranstaltung

Leibniz-Kolleg Potsdam 2018: Künstliches Leben

Prof. Dr. Petra Schwille, Prof. Dr. Reiner Anselm

Programm:

09:45-12:15 Uhr: Einführungsvorträge

ab 15:00 Uhr: Hauptvorträge

  • Gibt es eine kleinste Form des Lebens?
    Prof. Dr. Petra Schwille
    Direktorin am Max-Planck-Institut für Biochemie Martinsried,... 
mehr erfahren

25.04.2018, 14:00 Uhr  –  Haus 9, Raum 2.22
Institutskolloquium

Mathematik Neu Denken

Rainer Danckwerts (Universität Siegen), Thomas Bauer (Universität Marburg)

Mathematiklehrerbildung Neu Denken

Abstract:

Die Probleme der universitären Lehrerbildung im Fach Mathematik für das gymnasiale Lehramt sind alt, gut beschrieben und vielfach unverändert aktuell.... 

mehr erfahren

24.04.2018, 13:00  –  Haus 9, Raum 2.22
Gastvortrag

When do the spectra of self-adjoint operators converge?

Siegfried Beckus (Technion Haifa, Israel)

The central object of the talk are operator families indexed over a topological space where each single operator is self-adjoint and bounded. Thus, the spectrum of each single operator is a compact... 

mehr erfahren

23.04.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

The Positive Mass Conjecture for closed Riemannian manifolds

Andreas Hermann

The Positive Mass Conjecture for asymptotically flat Riemannian manifolds is a famous problem in geometric analysis which has been open for a long time and seems to have been solved in recent work by... 

mehr erfahren

20.04.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Renormalization of quantum field theory on Riemannian manifolds

Viet Dang Nguyen (Lyon I)

I will present an overview of results obtained with Bin Zhang (Sichuan University). We will start by giving a simple example which shows the necessity to subtract infinities in quantum field theory.... 

mehr erfahren

19.04.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Symmetry of the Hadamard coefficients for a formally self-adjoint, normally hyperbolic operator on a globally hyperbolic Lorentzian manifold

Max Lewandowski

In the case of the Klein-Gordon field on Minkowski space a certain linear combination of the 4 standard fundamental solutions (advanced, retarded, Feynman and anti-Feynman propagator) yields a... 

mehr erfahren

16.04.2018, 16:00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Index theory on spacetimes

Christian Bär

We will give a survey on recent developments in index theory on spacetimes and discuss open problems.

mehr erfahren

13.04.2018, 10:15-11:15  –  Haus 28, Raum 0.104
SFB-Seminar

The Intrinsic Geometry of Scale-Free Networks

Tobias Friedrich (Hasso Plattner Institute)

The node degrees of large real-world networks often follow a power-law distribution. Such scale-free networks can be social networks, internet topologies or many other networks. There is, however, no... 

mehr erfahren

13.04.2018, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Modular curvature and Hypergeometric functions

Yang Liu (MPI, Bonn)

In noncommutative geometry, an essential question is to extend the notion of metric and curvature in Riemannian geometry to noncommutative spaces in a operator theoretical framework. A fundamental... 

mehr erfahren

13.04.2018, 11:00  –  University of Hamburg, Geomatikum, Bundesstraße 55
Seminar "Nonlinear Wave Equations"

The Characteristic Cauchy Problem

Oliver Lindblad, Klaus Kroencke, Felix Lubbe

11:00Oliver LindbladIntroduction to the characteristic Cauchy Problem
13:30Klaus KroenckeIntroduction to the linear Problem 1
15:00Felix LubbeIntroduction to the linear Problem 2
mehr erfahren

12.04.2018, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

A nonlocal generalization of Green hyperbolic operators

Christopher Fewster (York, England)

I describe how Bär's theory of Green hyperbolic partial differential operators can be generalized to nonlocal operators, where the nonlocality is confined to a compact spacetime region. Operators of... 

mehr erfahren

13.03.2018, 13:00-14:00  –  Haus 28, Raum 0.104
SFB-Seminar

Composing stochastic quasi-Newton-Type algorithms

Thomas Schön (Uppsala University, Sweden)

In this talk I will focus on one of our recent developments where we show how the Gaussian process (GP) can be used to solve stochastic optimization problems. Our main motivation for studying these... 

mehr erfahren

13.03. bis 16.03.2018  –  Campus Griebnitzsee
Workshop

Congrès MATh.en.JEANS 2018

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 ... 

mehr erfahren

09.03.2018, 10:15-11:15  –  Haus 28, Raum 0.104
SFB-Seminar

On stability of a class of Kalman-Bucy filters for systems with non-linear dynamics

Toni Karvonen (Aalto University, Finland)

This talk discusses stability of a class of Kalman-Bucy filters (including the classical extended Kalman-Bucy filter) for continuous-time systems with non-linear dynamics and linear measurements. The... 

mehr erfahren

08.03.2018, 14:00 Uhr  –  Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

The Cauchy problem for the linearised Einstein equation and the Goursat problem for wave equations

Oliver Lindblad Petersen

mehr erfahren

02.03.2018, 10:15-11:15  –  Haus 28, Raum 0.104
SFB-Seminar

Improving MCMC samplers with spectral theory and optimal transport

Nikolas Nüsken (Imperial College London)

Markov Chain Monte Carlo methods are popular tools in Bayesian statistics and molecular dynamics to draw samples from a given probability distribution, using appropriate ergodic stochastic dynamics.... 

mehr erfahren

23.02.2018, 10:00-11:00  –  Haus 28, Raum 0.104
SFB-Seminar

Machine Learning for Sensor Fusion in Positioning and Navigation

Arno Solin (Aalto University, Finland)

Low-cost and noisy sensor sources in modern smartphones introduce both interesting possibilities for new applications, and challenges for inference methods needing to cope with the low-quality data.... 

mehr erfahren

23.02.2018, 11:00-12:00  –  Haus 28, Raum 0.104
SFB-Seminar

Data Assimilation in Autonomous Vehicles

Erin Linebarger (University of Utah)

Guidance of autonomous vehicles (AVs) poses different challenges for data assimilation methods than geophysical applications, requiring novel approaches. One promising approach is the use of a swarm... 

mehr erfahren

20.02.2018, 9:00-13:00  –  Haus 9, Raum 2.22
Institutsveranstaltung

Network meeting of the Alexander von Humboldt Foundation

Program:

9 am: Words of welcome by Wilhelm Huisinga (Director of the Institute)

9:10 am: Presentation of the participants

9:30 - 11 am: Talks by Humboldt fellows

  • Ana Alonso Serrano (Spain): Quantum... 
mehr erfahren

19.02. bis 23.02.2018  –  Campus Golm, Haus 10, Raum 0.25
Workshop

Geometric and Singular Analysis 2018

Workshop “Geometric and Singular Analysis”

 

https://www.math.uni-potsdam.de/professuren/analysis/GSA2018

 

mehr erfahren

19.02.2018, 10:00 Uhr  –  Haus 9, Raum 2.22
Verteidigung der Masterarbeit / Defence of the Master thesis

Impact of Correlations of Parameter Estimates in Optimal Design

Florian Mikolajczak

mehr erfahren

14.02. bis 16.02.2018  –  Haus 9, Neues Palais
Forschungsseminar Wahrscheinlichkeitstheorie

Stochastic processes and statistical machine learning I

https://www.math.uni-potsdam.de/professuren/proba/cdfa2018/

mehr erfahren

09.02.2018, 10:30  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Algebraic structures of branched zeta values

Pierre Clavier (Potsdam)

Multi zeta values (MZVs) are algebra morphims for some combinatorial products on words. They have a rich algebraic structure and are generalised to trees by the branched zeta values (BZVs). So a... 

mehr erfahren

08.02.2018, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Symmetric spaces

Florian Hanisch

[1, Ch. 7F]

mehr erfahren

08.02.2018, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

The supersymmetric nonlinear sigma model as a geometric variational problem: A status report

Volker Branding (Universität Wien)

We will discuss the functional of the supersymmetric nonlinear sigma model as a geometric variational problem. Its critical points couple the harmonic map equation to spinor fields, these became known... 

mehr erfahren

07.02.2018, 14:15  –  Haus 9, Raum 2.22
Institutskolloquium

Probabilistic approaches to the evolution of some biological systems

Jean Bertoin (Universität Zürich), Anton Wakolbinger (Goethe-Universtität Frankfurt)

The colloquium begins at 14:15  with a talk

Large populations over many generations:

from Wright and Fisher to experimental evolution

by Anton Wakolbinger (Goethe University, Frankfurt)

Abstract:
... 

mehr erfahren

05.02.2018, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Harmonic Maps with Values in Lie Groups

Chandrashekar Devchand

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

02.02.2018, 10:15-11:45  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Data Assimilation: Past, Present and Future

Michael Ghil (École Normale Supérieure, Paris)

We introduce basic ideas and methods of data assimilation in meteorology and oceanography, and illustrate their progress from numerical weather prediction to ocean and climate studies. Novel... 

mehr erfahren

01.02.2018, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Curvature of homogeneous spaces

Claudia Grabs

[1, Ch. 7C]

mehr erfahren

31.01.2018, 14.00  –  Haus 9, Raum 2.22
Doktorandentag

Meet and Greet - Ph.D. Edition

The ideal opportunity to get to know your fellow Ph.D students. (There will be cookies!)

mehr erfahren

29.01.2018, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Regularity of Weakly Stationary Maps with Values in the Sphere

Jan Metzger

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

26.01.2018, *11:00 Uhr*  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

On the construction of a perturbative Quantum Field Theory (after R. Borcherds)

Estanislao Herscovich (UJF Grenoble)

R. Borcherds has introduced a different point of view to formalise perturbative Quantum Field Theory (pQFT), which shares however several features with other well-known constructions in the literature... 

mehr erfahren

26.01.2018, 10:15-11:15  –  Haus 14, Raum 4.15/16
SFB-Seminar

Multi-stability & Fixational Eye Movements: an energy potential modeling approach

Kevin Parisot (GIPSA-LAB Grenoble)

see also the list of SFB seminar events

mehr erfahren

26.01.2018, 9:15-10:15  –  Haus 9, Raum 2.22
SFB-Seminar

Financial Market History: Reflections on the Past for Mathematicians today

Nicole El Karoui (Ecole Polytechnique)

see also the list of SFB seminar events

mehr erfahren

26.01.2018, 10:45-11:45  –  Haus 28, Raum 0.104
SFB-Seminar

Minimax optimality in Robust Detection of disorder times in Doubly Stochastic Poisson Process

Nicole El Karoui (Ecole Polytechnique)

see also the list of SFB seminar events

mehr erfahren

25.01.2018, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Riemannian homogeneous spaces

Christian Bär

[1, Ch. 7B, incl. proof of Thm. 7.19], see also [2, p. 176]

mehr erfahren

25.01.2018, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Global existence of wave maps and some generalizations on expanding spacetimes

Klaus Kröncke (Hamburg)

We prove the global existence of wave maps with small initial data on globally hyperbolic manifolds of arbitrary dimension which satisfy a suitable growth condition. In addition, we also prove a... 

mehr erfahren

24.01.2018, 14:30 Uhr  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

22.01.2018, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Lorentz Spaces / Wente Inequality refined

Sylvie Paycha / Florian Hanisch

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

19.01.2018, 10:15-11:15  –  Haus 28, Raum 0.104
SFB-Seminar

Generative Deep Learning

Sebastian Stober (Universität Potsdam)

A short introduction into Deep Learning will be followed by an overview on Deep Generative Models. This will include energy based models (Boltzmann Machines) and more recent developments with... 

mehr erfahren

19.01.2018, *11:00 Uhr*  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Grothendieck in the 80's: A portrait of his mathematical testament

Alexander Cruz Morales (MPI Bonn and UNAL Bogotá)

Alexander Grothendieck was one of the most influential figures
in mathematics during the last century and his legacy will remain for
the next centuries. During the 80's he wrote a series of mathematical
... 

mehr erfahren

18.01.2018, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Examples of homogeneous manifolds

Sebastian Hannes

[3, 3.65-3.68]

mehr erfahren

18.01.2018, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

The Yamabe problem on Lorentzian manifolds

Viktoria Rothe

We will consider the Yamabe Problem on globally hyperbolic spatially compact Lorentzian manifolds (M,g) of dimension 4: Given a Lorentzian metric g on M, find a metric conformal to g with constant... 

mehr erfahren

18.01.2018, 16:00 - 20:00  –  Auditorium maximum, Campus Am Neuen Palais
Institutsveranstaltung

Siegerehrung der Mathematikolympiade, Regionalrunde

Programm:
16:00 - 17:30 Uhr: Klassen 3-5
18:00 - 19:30 Uhr: Klassen 6-12

mehr erfahren

17.01.2018, 14:00 Uhr  –  Haus 9, Raum 2.22
Institutskolloquium

From Operators and Function Theory to Parabolic Problems: Semigroups everywhere

Wolfgang Arendt (Universität Ulm), Isabelle Chalendar (University Paris Est)

The colloquium begins at 14:00  with a talk

Composition operators on spaces of analytic functions: universality and asymptotics

by Isabelle Chalendar (University Paris Est)

Abstract:
Composition... 

mehr erfahren

15.01.2018, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Hardy Spaces

Markus Klein

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

12.01.2018, 10:15-11:45  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Pharmacometrics: Analysing and understanding variability and uncertainty in clinical data

Charlotte Kloft (FU Berlin)

mehr erfahren

11.01.2018, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Invariant differential operators

Vít Tuček (Prag)

It is well known that Laplace and Dirac operators on $\mathbb{R}^{p, q}$ admit strictly larger Lie algebra of symmetries than just the orthogonal ones, namely they are invariant with respect to... 

mehr erfahren

11.01.2018, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Homogeneous manifolds 2

Andreas Hermann

[3, 3.58-3.64]

mehr erfahren

09.01.2018, 11:00  –  University of Hamburg, Geomatikum, Bundesstraße 55
Seminar "Nonlinear Wave Equations"

Wave Maps

Philip Thonke, Klaus Kroencke, Oliver Lindblad

11:00Philip Thonke2+1 Large Data Global Existence: Introduction
13:30Klaus Kroencke2+1 Large Data Global Existence: Outline and Extension Procedure
15:00Oliver Lindblad2+1 Large Data Global Existence:... 
mehr erfahren

08.01.2018, 16:15 – 17:45  –  Freie Universität, Takustr. 9 (Informatikgebäude), 14195 Berlin, großer Hörsaal
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Ist mathematisches Wissen sicher? Wirklich? Die Erfassung epistemologischer Überzeugungen von Studierenden

Benjamin Rott (Universität zu Köln)

Was denken Studierende über mathematisches Wissen? Halten sie es für eher sicher oder eher unsicher? Können sie ihre Position (sicher vs. unsicher) argumentativ untermauern? Und wie entwickeln sich... 

mehr erfahren

08.01.2018, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Wente Inequality

Alexander Friedrich

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

04.01.2018, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Homogeneous manifolds

Andreas Hermann

[3, 3.58-3.64]

mehr erfahren

04.01.2018, 16:00  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Symmetry of the Hadamard coefficients for a formally self-adjoint, normally hyperbolic operator on a globally hyperbolic Lorentzian manifold

Max Lewandowski

We will start with the case of operators with analytic coefficients and show that the Hadamard series in some point converges in some open neighborhood of that point. In that neighborhood the symmetry... 

mehr erfahren

20.12.2017, 14:00  –  Haus 9, Raum 2.22
Institutskolloquium

Learning and Imaging: A Trip through Modern Data Science

Carola Schönlieb (University of Cambridge), Gitta Kutyniok (TU Berlin)

The colloquium begins at 14:00  with a talk

Model-based learning in imaging

by Carola-Bibiane Schönlieb (DAMTP Cambridge)

Abstract:

One of the most successful approaches to solve inverse problems... 

mehr erfahren

18.12.2017, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Weak Compactness and Regularity of Harmonic Maps with Values in the Sphere

Jan Metzger

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

15.12.2017, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Yang-Mills fields on manifolds of dimension greater than four

Chand Devchand (MPI Potsdam)

The Yang-Mills (YM) equations have yielded a fascinating supply of novel results in mathematics. As PDEs these equations are rather well understood in dimensions four and below. For higher dimensions... 

mehr erfahren

14.12.2017, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Adjoint representation and bilinear operations

Andreas Hermann

[3, 3.44-3.57]

mehr erfahren

14.12.2017, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Minimal elastic energy surfaces

Claudia Grabs

Starting with a relaxed elastic shell, any deformation yields certrain stresses inside the material. In the static case, equilibrium configurations for a given deformation of the boundary are obtained... 

mehr erfahren

11.12.2017, 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

ALICE:Bruchrechnen: Tablet PCs im Unterricht der Sekundarstufe

Frank Reinhold, STR (Technische Universität München, TUM School of Education)

Die Bruchrechnung gilt als einer der schwierigeren Teilbereiche der mathematischen Grundbildung. Bisherige Forschungsarbeiten gehen davon aus, dass ein handlungsorientiertes Arbeiten und folglich die... 

mehr erfahren

11.12.2017, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Harmonic Maps with Values in Lie Groups 2

Sara Azzali

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

08.12.2017, 10:15-11:45  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Distributional Uncertainty in Uncertainty Quantification

Tim Sullivan (Zuse Institut Berlin und FU Berlin)

Many problems in forward and inverse uncertainty quantification assume a single probability distribution of interest, e.g. a distribution of random inputs or a prior measure for Bayesian inference.... 

mehr erfahren

08.12.2017, 10:30 Uhr
Arbeitsgruppenseminar Analysis

Rota's Classification Problem, Rewriting Systems and Groebner-Shirshov Bases

Li Guo (Rutgers University)

Throughout the history, mathematical objects are often
understood through studying operators defined on them. Well-known
examples include Galois theory where a field is studied by its
automorphisms (the... 

mehr erfahren

07.12.2017, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Continuous homomorphisms and closed subgroups

Philipp Bartmann

[3, 3.38-3.43]

mehr erfahren

07.12.2017, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Boundary Value Problems for the Lorentzian Dirac Operator

Sebastian Hannes

On a globally hyperbolic spacetime the Lorentzian Dirac Operator under APS boundary conditions is Fredholm and its kernel consists of smooth spinors. We will discuss a certain class of boundary... 

mehr erfahren

04.12.2017, 16:15 – 17:45  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Natürliche Differenzierung – ein Konzept zum konstruktiven Umgang mit Heterogenität

Prof. Dr. Günter Krauthausen (Universität Hamburg)

Zunehmend heterogene Lerngruppen kennzeichnen den Mathematikunterricht – kein neues Phänomen, denn seit den 1970er Jahren liegen zahlreiche Empfehlungen zur Differenzierung vor. Warum wird gleichwohl... 

mehr erfahren

04.12.2017, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Harmonic Maps with Values in Lie Groups 1

Florian Hanisch

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

01.12.2017, 10:15-11:15  –  Haus 28, Raum 0.104
SFB-Seminar

A class of nonlinear filters induced by local couplings

Alessio Spantini (Massachusetts Institute of Technology, USA)

We introduce a class of structure-exploiting nonlinear filters for high-dimensional state-space models with intractable transition kernels. The idea is to transform the forecast ensemble into samples... 

mehr erfahren

01.12.2017, 11.00  –  Haus 9, Raum 2.22
Seminar: Hyperbolic Differential Equations on Curved Spacetimes

Endpoint Strichartz Estimates and the Wave Maps equation

Oliver Lindblad

mehr erfahren

01.12.2017, 13:30  –  Haus 9, Raum 2.22
Seminar: Hyperbolic Differential Equations on Curved Spacetimes

Small Data Global Existence for the Wave Maps equation

Florian Hanisch

mehr erfahren

01.12.2017, 15.00  –  Haus 9, Raum 2.22
Seminar: Hyperbolic Differential Equations on Curved Spacetimes

Self similar blow-up

Klaus Kröncke

mehr erfahren

01.12.2017, 09:30  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Lorentzian noncommutative geometry

Christian Brouder (Sorbonne Université, Paris)

Alain Connes' noncommutative geometry (NCG) is a powerful generalization of Riemannian geometry. Connes and collaborators showed that a Riemannian version of the standard model of particle... 

mehr erfahren

01.12.2017, 11:00 Uhr  –  Haus 31, Raum 0.18
Arbeitsgruppenseminar Analysis

A Locality Principle of Renormalization via Algebraic Birkhoff Factorization

Li Guo (Rutgers University)

An interpretation of the locality principle in renormalization is that a locality property is preserved in the process of renormalization. We establish such a principle in the framework of the... 

mehr erfahren

01.12.2017, 11:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

Wave Maps

Oliver Lindblad, Florian Hanisch, Klaus Kroencke

11:00Oliver LindbladEndpoint Strichartz Estimates
13:30Florian HanischSmall Data Global Existence
15:00Klaus KroenckeSelf Similar Blow Up
mehr erfahren

30.11.2017, 14:15
Seminar Geometrie

Lie groups and homogeneous spaces: Exponential map

Viktoria Rothe

[3, 3.29-3.37]

mehr erfahren

30.11.2017, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

The local version of the Lorentzian index theorem

Christian Bär

The Atiyah-Singer index theorem for Dirac operators D on compact Riemannian spin n-manifolds can be proved using the heat kernels of D*D and of DD*.  Namely, one easily sees that

<tex>\mathrm{ind}(D)... 

mehr erfahren

27.11.2017, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Sphere-Valued Maps and the Bäcklund Transformation

Alexander Friedrich

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

24.11.2017, 10:15-11:15  –  Haus 28, Raum 0.104
SFB-Seminar

On the use of the particle filter for geomechanical parameter estimation when monitoring subsidence due to hydrocarbon extraction

Femke Vossepoel (Delft University of Technology, Netherlands)

Fluid extraction from a subsurface hydrocarbon reservoir results in compaction of the reservoir, in particular cases leading to subsidence and induced seismicity. Coupled flow-geomechanical models... 

mehr erfahren

24.11.2017, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

The extended Sobolev scale for vector bundles

Tetiana Zinchenko (Chernihiv, Ukraine)

Elliptic theory on compact closed manifolds is usually developed in the scale of Sobolev spaces $H^s(\Gamma, V)$, where $V$ is a smooth vector bundle over $\Gamma$ and $s$ is a real number. Some parts... 

mehr erfahren

23.11.2017, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Coverings and simply-connected Lie groups

Claudia Grabs

[3, 3.22-3.28]

mehr erfahren

17.11.2017, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Integration on loop space, zeta-Pfaffians and index theory

Florian Hanisch (Potsdam)

We will discuss an approach to integrate differential forms on loop space. Integrals of this type naturally appear within formal path integral proofs of the Atiyah-Singer index theorem and we will... 

mehr erfahren

16.11.2017, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

The Regularized Hadamard Expansion

Margarita Kraus (Mainz)

A local expansion of a distributional bisolution of the Klein Gordon equation is proposed. This expansion is given by sequences of functions, which satisfy certain transport equations. These equations... 

mehr erfahren

16.11.2017, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Lie subgroups

Florian Hanisch

[3, 3.17-3.21]

mehr erfahren

15.11.2017, 14:30 Uhr  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung

mehr erfahren

13.11.2017, 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

„Roboter und Co. Spielerischer Erwerb informatischer Grundkompetenzen in der Primarstufe“

Prof. Dr. Silke Ladel (Universität des Saarlandes)

Computer, Tablets und Smartphones sind in der heutigen Lebenswelt allgegenwärtig. Die meisten Kinder nutzen diese Geräte täglich, ohne weiter darüber nachzudenken. Die Kinder sollen jedoch nicht nur... 

mehr erfahren

13.11.2017, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Sobolev Spaces and the Variational Approach

Elke Rosenberger

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

10.11.2017, 10:15-11:45  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Comparing deep neural networks against humans: Object recognition with weak signals

Felix Wichmann

The visual recognition of objects by humans in everyday life is typically rapid and effortless. Until very recently, animate visual systems were the only ones capable of this remarkable computational... 

mehr erfahren

09.11. bis 10.11.2017  –  Am Neuen Palais, Haus 8, Raum 1.45
Workshop

Kick-Off-Meeting "Geometry at Infinity"

Beginn: Donnerstag 09.11.2017 um 12:30
Ende: Freitag 10.11.2017 um 15:30
Ort: Campus Am Neuen Palais, Auditorium Maximum (Haus 8, Raum 1.45)

Programm

mehr erfahren

08.11.2017, 14:00  –  Haus 9, Raum 2.22
Institutskolloquium

Interactions between mathematics and physics: symmetries and randomness

Simone Warzel (TU München), Frank Rupert (LMU München)

Das Kolloquium beginnt um 14:00 Uhr mit einem Vortrag

 

von Rupert Frank (LMU, München):

 

"Symmetry and Reflection Positivity"

 

Abstract:

There are many examples in mathematics,... 

mehr erfahren

06.11.2017, 16.00  –  Haus 9, Raum 0.14
Oberseminar Analysis, Geometrie, Physik

Conservation Laws for Harmonic Maps 2

Philip Thonke

This semester we will study the first chapters of the book "Harmonic Maps, Conservation Laws and Moving Frames" by Frédéric Hélein.

mehr erfahren

03.11.2017, 11.00  –  Haus 9, Raum 2.22
Seminar: Hyperbolic Differential Equations on Curved Spacetimes

Introduction to the Wave Map Equation

Philip Thonke

mehr erfahren

03.11.2017, 13.30  –  Haus 9, Raum 2.22
Seminar: Hyperbolic Differential Equations on Curved Spacetimes

Algebraic Structure and Coulomb Gauge

Alexander Friedrich

mehr erfahren

03.11.2017, 15.00  –  Haus 9, Raum 2.22
Seminar: Hyperbolic Differential Equations on Curved Spacetimes

Singularities and Equivariant Wave Maps

Jan Metzger

mehr erfahren

03.11.2017, 11:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

Wave Maps

Philip Thonke, Alexander Friedrich, Jan Metzger

11:00Philip ThonkeIntroduction to the Wave Map Equation
13:30Alexander FriedrichGauge Conditions
15:00Jan MetzgerEquivariant Wave Maps
mehr erfahren

02.11.2017, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Homomorphisms

Max Lewandowski

[3, 3.13-3.16]

mehr erfahren

02.11.2017, 16:15  –  Haus 9, Raum 1.10
Forschungsseminar Differentialgeometrie

Supersymmetric Path Integrals (I)

Florian Hanisch

Integration over the space of superpaths, associated to a Riemannian manifold, plays an important role in the path integral approach to the Atiyah-Singer index theorem. This is indeed equivalent to... 

mehr erfahren

01.11.2017, 14:15  –  Haus 9, Raum 2.22
Doktorandentag

Doktorandentag / PhD day

  • 14:15-14:45 Alexander Friedrich: Generalized Willmore Surfaces –
 From Blood Cells to Quasi Local Energies
  • 14:45-15:15 Pause und Wahl der Doktorandenvertreter/innen
  • 15:15-15:45 Johanna Goral:... 
mehr erfahren

27.10.2017, 10:30 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Accelero-summation and the analyticity problem of QFT

Pierre Clavier (Potsdam)

Most physical quantities of quantum field theory (QFT can only be computed via a perturbative approach, i.e. a formal series.

A natural question is how to assign an analytic function to this formal... 

mehr erfahren

26.10.2017, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Constructing temporal functions and isometric embeddings of Lorentzian manifolds

Olaf Müller (HU Berlin)

In the last years, several new methods for the construction of temporal functions with specified geometric properties on a given spacetime have been developed. In this talk, a selection of them is ... 

mehr erfahren

26.10.2017, 14:15  –  Haus 9, Raum 1.10
Seminar Geometrie

Lie groups and homogeneous spaces: Lie groups and their Lie algebras

Sebastian Hannes

[3, 3.1-3.12]

mehr erfahren

25.10. bis 27.10.2017  –  Campus Golm
Workshop

Mini-course in Discrete Mathematics: "Relatively free Doppelsemigroups"

A. V. Zhuchok

A. V. Zhuchok (Luhansk Taras Shevchenko National University, Starobilsk, Ukraine)

25.10.2017 14:15 – 15:45 in 2.09.1.10
26.10.2017 14:15 – 15:45 in 2.31.0.18
27.10.2017 14:15 – 15:45 in 2.09.0.14

Abst... 

mehr erfahren

23.10.2017, 16:15 - 17:45  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Wie geht es, wenn die Realität auch beachtet werden soll? Offene, realitätsbezogene Problemvariation in mehreren Schulstufen

Prof. Dr. Gabriella Ambrus (Eötvös-Loránd-Universität Budapest)

Die Offenheit einer Aufgabe ist noch heute für viele Schüler und Schülerinnen ungewöhnlich und kann sogar Probleme verursachen. Zum Beispiel beim Lösen von realitätsnahen Aufgaben.

Inwieweit sind... 

mehr erfahren

20.10.2017, 11:00 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Infinite-dimensional Lie groups in renormalisation and regularity structures

Alexander Schmeding (TU Berlin)

In the theory of renormalisation of quantum field theories (Connes and Kreimer) and in Hairer's regularity structures for stochastic differential equations certain "renormalisation groups" appear.
Thes... 

mehr erfahren

19.10.2017, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Dirac eigenvalues under codimension one collaps

Saskia Roos (Bonn)

After giving a characterization of a collaps of codimension one we study the behavior of Dirac eigenvalues in that situation. We show that there are converging eigenvalues if and only if there is an... 

mehr erfahren

13.10.2017, 10:15-11:45  –  Campus Golm, Haus 28, Raum 0.108
SFB-Kolloquium

Stochastic Models of Gene Expression

Philippe Robert

Protein production is a key process of prokaryotic and eukaryotic cells consuming more that 80% of their resources. The cytoplasm of the cell being a disorganized medium subject to thermal noise, the... 

mehr erfahren

04.10.2017, 10:15 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Direct and Inverse Problems in Machine Learning : Kernel Methods and Spectral Regularization

Nicole Mücke

mehr erfahren

25.09. bis 26.09.2017, 9:00 Uhr  –  Campus Am Neuen Palais, Haus 9, Raum 9.1.12
SFB-Seminar

SFB Kick-Off Workshop

mehr erfahren

19.09.2017, 10:00 Uhr  –  Haus 29, SR 0.25/0.26
Verteidigung der Dissertation / Defence of the PhD thesis

Cell physiology based pharmacodynamic modeling of antimicrobial drug combinations

Christoph Hethey

mehr erfahren

15.09.2017, 10:15 Uhr  –  Campus Golm, Haus 28, Raum 2.123
SFB-Seminar

Improving Data Assimilation By Surfing the Waves

Juan M. Restrepo

Department of Mathematics and
College of Earth Oceans and Atmospheric Sciences
Oregon State University

Abstract:
The use of models and data, via data assimilation, is one of the strategies pursued to... 

mehr erfahren

21.08.2017, 10:15 Uhr  –  Campus Golm, Haus 9, Raum 0.14
SFB-Seminar

Minimization-based sampling from the posterior distribution for inverse problems with Gaussian prior distributions

Dean S. Oliver

Abstract link

see also the list of the SFB seminar events

mehr erfahren

20.07.2017, 16:15 Uhr  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Solutions to the linearized Einstein constraint equations

Oliver Lindblad Petersen

Any closed Riemannian manifold which has vanishing scalar curvature is a solution to the relativistic vacuum constraint equations. Examples include the flat torus and certain Berger spheres. If the... 

mehr erfahren

19.07.2017, 10:15 Uhr  –  Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

The Navier-Stokes Equations for Elliptic Quasicomplexes

Azal Mera

mehr erfahren

18.07.2017, 10.15  –  Haus 9, Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Noise sensitivity of Lévy driven SDE’s : estimates and applications

Tania Kosenkova (Potsdam)

The topic of this talk is induced by the following question: whether the deviation between the solutions of two different Lévy driven SDE’s can be controlled in terms of the characteristics of the... 

mehr erfahren

18.07.2017, 11.00  –  Haus 9, Raum 0.14
Forschungsseminar Wahrscheinlichkeitstheorie

Wasserstein distances between discretely observed Lévy processes

Ester Mariucci ( HU Berlin)

We present some upper bounds for the Wasserstein distance of order p between the product measures associated with the increments of two independent Lévy processes with possibly infinite Lévy measures.... 

mehr erfahren

18.07.2017, 10:15  –  Haus 9, Raum 2.22
Verteidigung der Dissertation / Defence of the PhD thesis

Higher order rectifiability in Euclidean space

Mario Santilli

mehr erfahren

18.07.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

On Quasilinear Wave Equations and Klainerman Estimates

Sari Ghanem

14:00Sari GhanemStability of Minkowski 3
mehr erfahren

14.07.2017, 11:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Universal properties of rooted trees and rooted forests

Pierre Clavier

I will present the results obtained by Lucas Delage (Potsdam). As already shown in a previous presentation, rooted trees have a universal property as pre-Lie algebras, while rooted forests have... 

mehr erfahren

14.07.2017, 10:15 Uhr  –  Campus Golm, Haus 28, Raum 0.108
SFB-Seminar

Adaptive convergence results for numerical efficient Bayesian methods

Jan van Waaij

Jan van Waaij , Faculteit der Natuurwetenschappen, Wiskunde en Informatica Korteweg-de Vries Instituut, University of Amsterdam, Netherlands

abstract link

This is collaborative work with: Moritz... 

mehr erfahren

13.07.2017, 12.00-12.30  –  Haus 09, Raum 1.10, Golm
Forschungsseminar Wahrscheinlichkeitstheorie

Masterarbeitverteidigung "Expected Tumor Cell Lifespan During Radiotherapy Treatment: A Heterogeneous Stochastic Model"

Alexandra Wolff

mehr erfahren

13.07.2017, 12.00-12.30  –  Haus 09, Raum 1.10, Golm
Verteidigung der Masterarbeit / Defence of the Master thesis

Expected Tumor Cell Lifespan During Radiotherapy Treatment: A Heterogeneous Stochastic Model

Alexandra Wolff

mehr erfahren

13.07.2017, 16:15 Uhr  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Linear wave equations with initial data on compact Cauchy horizons

Oliver Lindblad Petersen

When studying wave equations in a region of a curved spacetime, one usually assumes that the region satisfies certain causality conditions. Expressed in mathematical terms, one assumes that the region... 

mehr erfahren

12.07.2017, 10:30  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Homotopy invariance of cohomology and signature of a Riemannian foliation. Part 2

Georges Habib

We prove that any smooth foliation that admits a Riemannian foliation structure has a well-defined basic signature, and this geometrically defined invariant is actually
a foliated homotopy invariant.... 

mehr erfahren

12.07.2017, 15:00 Uhr  –  Haus 9, Raum 2.22
Institutskolloquium

From classical to quantum gravity

Kristina Giesel (Universität Erlangen-Nürnberg), Benjamin Bahr (Universität Hamburg)

  • 15:00 Kristina Giesel (University of Erlangen)
  • 16:00 Coffee break
  • 16:30 Benjamin Bahr (University of Hamburg)

 Abstracts:

Spin networks and spin foam models  (Benjamin Bahr)
While spin networks... 

mehr erfahren

11.07.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

On Quasilinear Wave Equations and Klainerman Estimates

Sari Ghanem

14:00Sari GhanemStability of Minkowski 2
mehr erfahren

07.07.2017, 9.00  –  Haus 9, Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Pesin’s formula for isotropic Brownian flows

Vitalii Senin (Berlin)

Pesin's formula is a relation between the entropy of a dynamical system and its positive Lyapunov exponents. This formula was first established by Pesin in the late 1970s for some deterministic... 

mehr erfahren

07.07.2017, 11:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Homotopy invariance of cohomology and signature of a Riemannian foliation. Part 1/2

Georges Habib

We prove that any smooth foliation that admits a Riemannian foliation structure has a well-defined basic signature, and this geometrically defined invariant is actually a foliated homotopy... 

mehr erfahren

06.07.2017, 14:15 Uhr  –  Haus 9, Raum 0.14
Seminar Geometry and Physics

A General Definition of Conserved Quantities in General Relativity

Sajad Aghapour (IPM, Teheran)

In this talk I will review a paper by Zoupas and Wald which summarizes the proposal for a general definition of "conserved quantities" in General Relativity and other theories of gravity developed by... 

mehr erfahren

04.07.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

On Quasilinear Wave Equations and Klainerman Estimates

Sari Ghanem

14:00Sari GhanemStability of Minkowski Space 1
mehr erfahren

03.07.2017, 16:15 - 17:45  –  Campus Golm, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Den diagnostischen Blick schärfen – Mathematische Diagnostikkompetenz ange- hender Lehrkräfte messen und fördern

Prof. Dr. Antje Ehlert und Luisa Wagner (Uni Potsdam)

Der Erwerb mathematischer Basiskompetenzen ist einer der wichtigsten Entwicklungsprozesse in der Grundschule. Um ihn erfolgreich meistern zu können, ist ein Unterricht notwendig, der die... 

mehr erfahren

30.06.2017, 10.15-11.45  –  Golm, Haus 9, 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Ruin measures and occupation times for spectrally negative Lévy processe

Hélène Guérin (Rennes )

I will present some risk measures for insurance models, the classical ruin and different parisian
ruins, who are linked to occupation times of the surplus process. Some explicit results will be
given in... 

mehr erfahren

29.06.2017, 17:45  –  Free University Berlin, Arnimallee 6, SR 009
Seminar "Topics in Geometric Analysis"

Barbara Nelli

17:45 Barbara Nelli (L'Aquila) Minimal Surfaces in the Heisenberg Space

We discuss the behaviour of some minimal surfaces in the Heisenberg space. In particular, we deal with existence and... 

mehr erfahren

28.06.2017, 15:00 Uhr  –  Haus 9, Raum 2.22
Institutsrat

Institutsratssitzung 28.06.2017

mehr erfahren

27.06.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

On Quasilinear Wave Equations and Klainerman Estimates

Jan Metzger

14:00Jan MetzgerCounterexamples to Existence of Solutions
mehr erfahren

26.06.2017, 16:15 - 17:45  –  Freie Universität, Takustr. 9 (Informatikgebäude), 14195 Berlin, großer Hörsaal
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Die Fachsprache Mathematik als Stolperstein oder Baustein im Wissensbildungs- prozess? Grundlagen und Merkmale eines sprachsensiblen Mathematikunterrichts

Prof. Dr. Barbara Schmidt-Thieme (Universität Hildesheim)

Lehren und Lernen von Mathematik geht immer mit dem Gebrauch von Sprache einher: bei der Einführung oder Definition mathematischer Objekte, bei Diskussionen über verschiedene Lösungswege, bei der Do-... 

mehr erfahren

23.06.2017, 10.15  –  Haus 9, Raum 0.13
Forschungsseminar Wahrscheinlichkeitstheorie

About some stochastic particle dynamics

Laure Pédèches (Toulouse/Potsdam)

In this talk, on the one hand, we will look into the asymptotic behaviour of stochastic version of
the Cucker-Smale model, while also presenting a propagation of chaos result. On the other hand,
we will... 

mehr erfahren

23.06.2017, 10:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Elliptic pseudo-differential operators in QFT on curved spacetimes

Michal Wrochna (Grenoble)

In Quantum Field Theory on curved spacetimes, the problem of constructing Wick powers of fields amounts to dealing with a priori ill-defined trace densities of certain Fourier Integral Operators.... 

mehr erfahren

22.06.2017, 16:15  –  Raum 0.14
Forschungsseminar Differentialgeometrie

Heat kernel estimates for general boundary problems

Alexander Strohmaier

The heat kernel in a domain with Dirichlet boundary conditions satisfies so-called “not feeling the boundary estimates”. These reflect the locality of the heat expansion and can for example be derived... 

mehr erfahren

22.06.2017, 14:15 Uhr  –  Haus 9, Raum 0.14
Seminar Geometry and Physics

Introduction to conformal Killing forms

Andreas Hermann

Conformal Killing p-forms are a generalization of conformal Killing vector fields on semi-Riemannian manifolds. In this talk we review some known properties of conformal Killing p-forms. We describe... 

mehr erfahren

20.06.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

On Quasilinear Wave Equations and Klainerman Estimates

Philip Thonke

14:00Philip ThonkeTimelike Minimal Surfaces
mehr erfahren

19.06.2017, 16:15 - 17:45  –  Campus Golm, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Lernen mit digitalen Schulbüchern im Mathematikunterricht der Grundschule

Prof. Dr. Sebastian Rezat (Uni Paderborn)

Die Digitalisierung erhält zunehmend Eingang in die Schulen – auch in den Mathematikunterricht der Grundschule. Der Mehrwert der digitalen Medien wird oft angepriesen, jedoch gibt es bislang nur... 

mehr erfahren

16.06.2017, 10.00  –  TU Berlin, Raum MA 415 des Mathematikgebäudes
Forschungsseminar Wahrscheinlichkeitstheorie

Verteidigung der Doktorarbeit ''Well-posedness and stability of stochastic evolution equations arising from neuroscience''

Jennifer Krüger

mehr erfahren

16.06.2017, 11:00  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

The universal property of the grafting operator

Lucas Delage (Potsdam)

It is well known that the grafting operator B_+, defined on the vector space of forest by gluing every tree of a forest to a common root, obeys the following universal property : for any commutative... 

mehr erfahren

15.06.2017, 16:15  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Topics in Geometric Analysis"

Huy Nguyen and Thomas Mettler

16:15 Huy Nguyen (London)  Mean Curvature Flow of Codimension Two Surfaces

In this talk, I will describe joint work with Charles Baker. We will consider surfaces of co-dimension two in... 

mehr erfahren

14.06.2017, 15:30 Uhr  –  Albert Einstein Institute, Room 0.01
Seminar Geometry and Physics

Applications of PDE compatibility complexes in relativity

Igor Khavkine

I will discuss the Killing operator (K_{ab}[v] = \nabla_a v_b + \nabla_b v_a) on a (pseudo-)Riemannian manifold as an overdetermined PDE and its (formal) compatibility complex. It has been observed... 

mehr erfahren

13.06.2017, 15:00 - 17:00  –  University of Potsdam, Campus Golm, Building 29, Room 29.0.25
Verteidigung der Dissertation / Defence of the PhD thesis

Disputation Yuan Cheng

Yuan Cheng

Recursive State Estimation in Dynamical Systems

 

This thesis discusses various data assimilation methods, with a special focus on the applicability to spatio-temporal systems. With ensemble Kalman... 

mehr erfahren

12.06.2017, 16:15 - 17:45  –  Humboldt-Universität, Unter den Linden 6, 10099 Berlin, Raum 2014 A
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

Was läuft im Mathematikunterricht und in der Lehrerbildung falsch? Wie könnte umgesteuert werden?

Prof. em. Dr. Dr. h.c. Erich Christian Wittmann

Den ersten Teil des Vortrags bilden operative Beweise mit Plättchen, die vom Kindergarten bis zur Univer- sität reichen. Diese Beweise verkörpern das, was dem heutigen Mathematikunterricht im Kern... 

mehr erfahren

09.06.2017, 11 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

The de Rham complex over Hölder spaces weighted at infinity and the Navier-Stokes equations

Alexander Shlapunov (Siberian Federal University)

mehr erfahren

08.06.2017, 14:15 Uhr  –  Haus 9, Raum 0.14
Seminar Geometry and Physics

Potentials and conservation laws

Lars Andersson

I will discuss how Hertz potentials can be used to construct conservation laws for massless fields including Maxwell and linearized gravity.

mehr erfahren

08.06.2017, 16:15  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Ein Indexsatz für homogene Räume

Christian Bär

Ich werde erklären, wie sich der Fredholm-Index eines äquivarianten elliptischen Operators über einem homogenen Raum darstellungstheoretisch berechnen lässt.

mehr erfahren

07.06.2017, 15:00  –  Haus 9, Raum 2.22
Institutskolloquium

Ungewöhnliche Einblicke in die Mathematik

Ehrhard Behrends (FU Berlin) und Dirk Werner (FU Berlin)

  • 15:00 Dirk Werner (FU Berlin)
  • 16:00 Coffee break
  • 16:30 Ehrhard Behrends (FU Berlin)

Abstracts:

Wer soll das alles lesen? (Dirk Werner)

Klassifizieren, Indexieren und Referieren mathematischer... 

mehr erfahren

02.06.2017, 10.15-11.45  –  2.09.0.13
Forschungsseminar Wahrscheinlichkeitstheorie

Well-Posedness and stability of Stochastic Evolution Equations arising from Neuroscience

Jennifer Krüger (Berlin)

We study the existence and uniqueness of mild solutions to the deterministic and the stochastic neural field equation
with Heaviside firing rate. Since standard well-posedness results do not apply in... 

mehr erfahren

01.06.2017, 16:15  –  Free University Berlin, Arnimallee 6, SR 009
Seminar "Topics in Geometric Analysis"

John Huerta and Leon Escobar

16:15 John Huerta (Lisbon) G2 and the rolling ball

Understanding the exceptional Lie groups as the symmetry groups of simpler objects is a long-standing program in mathematics. Here, we... 

mehr erfahren

01.06.2017, 14:15 Uhr  –  Haus 9, Raum 0.14
Seminar Geometry and Physics

Electromagnetic duality in linearized gravity

Cedric Troessaert

I will review how, in the Hamiltonian formalism, one use a double potential formalism to obtain a manifestly duality invariant description of linearized gravity.

mehr erfahren

01.06.2017, 16:15 Uhr  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Foundations on elliptic operators on compact manifolds

Max Lewandowski

After establishing some important basics about pseudo differential operators we will construct a parametrix for elliptic operators on compact manifolds, which allows several conclusions, e.g. elliptic... 

mehr erfahren

30.05.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

On Quasilinear Wave Equations and Klainerman Estimates

Florian Hanisch

14:00Florian HanischSystems satisfying the null condition 3
mehr erfahren

26.05.2017, 11 Uhr  –  Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Secondary invariants for two-cocycle twists

Sara Azzali

We consider a class of Dirac-type operators, on the universal covering of a closed manifold, that are invariant under the projective action associated to a two-cocycle of the fundamental group.

These... 

mehr erfahren

23.05.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"

On Quasilinear Wave Equations and Klainerman Estimates

Florian Hanisch

14:00Florian HanischSystems satisfying the null condition 2
mehr erfahren

22.05.2017, 16:15 - 17:45  –  Campus Golm, Haus 28, Raum 0.108
Berlin-Brandenburgisches Seminar Mathematik und ihre Didaktik

HADES – mit geisteswissenschaftlichen Methoden Mathematik besser verstehen

Prof. Dr. Walther Paravicini (U Göttingen)

Wie kann man das, was zum Handwerkszeug eines Mathematikers/einer Mathematikerin gehört, systema- tisch erfassen und lern- sowie lehrbar machen? Davon handelt dieser Vortrag, wobei wir davon ausgehen,... 

mehr erfahren

19.05.2017, 10.15-11.45  –  2.09.0.13
Forschungsseminar Wahrscheinlichkeitstheorie

On mutual behavior of solutions of an SDE with non-regular drift

Olga Aryasova (Kyiv)

We consider a stochastic differential equation with a Gaussian noise and a drift vector having jump discontinuities
along a hyperplane or surface. We study the large time behavior of the distance... 

mehr erfahren

19.05.2017, 11 Uhr  –  Campus Golm, Haus 9, Raum 2.22
Arbeitsgruppenseminar Analysis

Locality and index theory

Sylvie Paycha

This talk (based on joint work with S. Azzali) discusses local linear forms on classical pseudo-differential operators on a closed manifold, and their relevance in index theory.
Local linear forms are... 

mehr erfahren

18.05.2017, 16:15  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Topics in Geometric Analysis"

Joachim Lohkamp

16:15 Joachim Lohkamp (Münster)  Skin Structures - An Introduction

Spaces arising from variational problems oftentimes carry very complicated singularities. Even worse, the regular portions... 

mehr erfahren

18.05.2017, 16:15 Uhr  –  Haus 9, Raum 0.14
Forschungsseminar Differentialgeometrie

Einführung in die Spin-Geometrie: Analytische Grundlagen

Max Lewandowski

Dirac-Operator auf riemannschen Mannigfaltigkeiten, Elliptizität, wesentliche Selbstadjungiertheit, Diskretheit des Spektrums

mehr erfahren

17.05.2017, 14:00 Uhr  –  Campus Golm, Haus 29, Raum 0.25/0.26
Verteidigung der Dissertation / Defence of the PhD thesis

Integrating Nonlinear Mixed Effects and Physiologically–Based Modeling Approaches for the Analysis of Repeated Measurement Studies --- With Applications in Quantitative Pharmacology and Quantitative Psycholinguistics

Alexander Solms

mehr erfahren

16.05.2017, 14:00  –  University of Potsdam, Campus Golm, Building 9, Room 2.22
Seminar "Nonlinear Wave Equations"