Events

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

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04.12.2025, 14:00-15:30  –  2.22
Seminar Geometry and Physics

Static and Stationary Vacuum Extensions Realizing Bartnik Boundary Data: Local Well-Posedness near Schwarzschild Spheres

Ahmed Ellithy

We consider the Bartnik extension problem, which originates from Bartink's definition of quasi-local mass. In this problem, we consider Bartnik boundary data on a topological 2-sphere (induced metric... 

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

11.02.2026, 11:00 – 13:00 Uhr  –  Campus Golm, Haus 28, Raum 0.108
Öffentlicher Vortrag

Lunch Talks: "Women in Science – Professorinnen der MatNat-Fakultät stellen sich vor"

tba

11.02.2026, 11 am – 1 pm  –  Campus Golm, Building 28, Room 0.108
Öffentlicher Vortrag

Lunch Talks: “Women in Science – Female Professors from the Faculty of Science Introduce Themselves”

tba