Events

19.11.2025, 13:00 Uhr  –  Haus 9, Raum 2.22
Forschungsseminar Diskrete Spektraltheorie

Calculus of variations for nonlocal Sobolev–Bregman forms

Artur Rutkowski

The Sobolev–Bregman integral forms are an \(L^p\) version of quadratic forms defining the fractional Sobolev spaces \(H^s\), that emerged in a natural way from the probabilistic potential theory in... 

20.11.2025, 16:15  –  Campus Golm, Haus 9, Raum 1.22
Forschungsseminar Differentialgeometrie

Codimension 2 transfer of signatures in L theory

Yuetong Luo (Göttingen)

The signature of a closed manifold is an important invariant in geometric topology. Recently, Higson, Xie, and Schick proved an invariance theorem for the K-theoretic signature in codimension 2. They... 

20.11.2025, 13:00 Uhr  –  Haus 9, Raum 2.22
Forschungsseminar Diskrete Spektraltheorie

The Bregman variation of semimartingales

Katarzyna Pietruska-Paluba

We introduce a generalization of the quadratic variation of a (semi)martingale: the increments of a process will be measured with the so-called Bregman divergence (instead of the quadratic function).... 

21.11.2025, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

Vector-valued oscillatory integrals and (ρ, δ)-type pseudodifferential calculus

Gihyun Lee (Potsdam)

I shall report on ongoing joint work with Vishvesh Kumar (Ghent University, Belgium), in which we construct a general pseudodifferential calculus of type \((\rho,\delta)\) associated with symbols... 

24.11.2025, 14:00 - 15:00 Uhr  –  2.14.0.21
Forschungsseminar: Gruppen und Operatoralgebren

Cuntz-Pimsner algebras of homeomorphisms twisted by vector bundles

Aaron Kettner (Czech Academy of Sciences)

Abstract:

In this talk, I will show how to construct a C*-correspondence from a
vector bundle together with a (partial) homeomorphism on the bundle's
base space. The associated Cuntz-Pimsner algebras... 

26.11.2025, 14:00 - 16:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

On the effectiveness of algebraic and geometric structures in the natural sciences

Nichol Furey (HU Berlin), Jorge Zanelli (CECs, Chile)

14:00  Nichol Furey (HU Berlin):  The unreasonable effectiveness of division algebras in the natural sciences.
14:45  Tea and Coffee Break
15:15  Jorge Zanelli (CECs, Chile):  The unreasonable... 

28.11.2025, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

How to measure quantum fields? Implementing a causal measurement scheme

Jan Mandrysch (Wien)

While measurement processes in standard quantum mechanics are well understood, the extension of these ideas to quantum field theory (QFT) remains a key challenge. In particular, ensuring that... 

28.11.2025, 13:30 Uhr  –  Haus 9, Raum 2.22
Forschungsseminar Diskrete Spektraltheorie

Characterizations of p-Parabolicity on Graphs

Florian Fischer

We study p-energy functionals on infinite locally summable graphs for \(p \in (1,\infty) \) and discuss that many well-known characterizations for a parabolic space are also true in this discrete,... 

03.12.2025, 14:30  –  Haus 9, Raum 2.22 + Zoom
Institutsrat

Institutsratssitzung 03.12.2025

mehr erfahren

05.12.2025, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

TBA

Chuangzhong Li (Qingdao, China) (online)

TBA

11.12.2025, 16:15 Uhr  –  Raum 1.22, Haus 9
Forschungsseminar Differentialgeometrie

Hodge Dualities in the Perturbation Setup and Applications:Perturbed Zeta Determinant and Analytic Torsion

Ihsane Malass

We consider the perturbation of the exterior differential by a closed one-form \(a\), \(d_a := d + a \wedge \cdot\), on a manifold with boundary. This gives rise to the perturbed (or twisted) de Rham... 

12.12.2025, 12:00  –  Campus Golm, Building 9, Room 1.22 and via Zoom
Arbeitsgruppenseminar Analysis

A Pre-tty Pre-amble to Pre-Lie Algebras from Combinatorial Species

Yannic Vargas (CUNEF University Madrid)

We present an introduction to pre-Lie algebras, an algebraic structure closely related to Lie algebras. From a combinatorial perspective, pre-Lie algebras are connected to the notion of insertion of... 

17.12.2025, 14:00 - 16:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

TBA

María Inés Frutos Fernández (Uni Bonn), Michael B. Rothgang (Uni Bonn)

TBA

18.12.2025, 16:15  –  TBA
Forschungsseminar Differentialgeometrie

TBA

Nadine Große (Freiburg)

TBA

14.01.2026, 14:00 - 16:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

TBA

Christian Mercat (Lyon), N.N.

TBA

16.01.2026, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

TBA

Daan Janssen (York, UK)

TBA

22.01.2026, 16:15 Uhr  –  TBA
Forschungsseminar Differentialgeometrie

TBA

Koen van den Dungen

TBA

23.01.2026, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

TBA

Janina Bernardy (Bonn)

TBA

29.01.2026, 16:15  –  Building 9, Room 1.22 (Joint session with Analysis group)
Forschungsseminar Differentialgeometrie

Equivalence between local and global Hadamard States with Robin boundary conditions on half-Minkowski spacetime

Claudio Dappiaggi (Pavia)

We construct the fundamental solutions and Hadamard states for a Klein-Gordon field in half-Minkowski spacetime with Robin boundary conditions in arbitrary dimensions using a generalisation of the... 

30.01.2026, 11:00  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

TBA

Beatrice Costeri (Pavia, IT)

TBA