Events Calendar

October 2024

01.10.2024, 11:45 - 12:45: Low-dimensional topology seminar, Miguel Orbegozo Rodriguez (ETH Zurich): Murasugi sums and primeness of links

Location: MPIM Lecture Hall

02.10.2024, 12:00 - 13:30: Physical Math Seminar, Ingmar Saberi (LMU München): Local Lie algebras from superconformal structures

Location: MPIM Lecture Hall

02.10.2024, 14:30 - 15:30: Number theory lunch seminar, Shinichi Kobayashi (Kyushu University/MPIM): A local sign decomposition for symplectic self-dual Galois representations

Location: MPIM Lecture Hall

02.10.2024, 17:00: Oberseminar, Joseph Cheriyan (C&O Department, University of Waterloo): Approximation algorithms for Flexible Graph Connectivity

Location: Seminar room, 1st floor, in the Research Institute for Discrete Mathematics/Arithmeum in Lennéstraße 2, Bonn.

Abstract

07.10.-11.10.2024: Workshop: Analysis and Geometry on Discrete Spaces, HIM

Location: HIM lecture hall (Poppelsdorfer Allee 45, Bonn)

Link

07.10.2024, 11:00-13:00: Abstract Homotopy Theory Seminar, Hadrian Heine (University of Oslo): A directed version of homotopy colimits

Location: MPIM Seminar Room

07.10.2024, 14:00-14:15: MPIM Topology Seminar, Leo Schelstraete (MPIM): Quantum topology: the case of odd Khovanov homology

Location: MPIM Lecture Hall

07.10.2024, 14:20-14:35: MPIM Topology Seminar, Daniel Galvin (MPIM): Equivalence relations on smooth structures on 4-manifolds

Location: MPIM Lecture Hall

07.10.2024, 14:40-14:55: MPIM Topology Seminar, Dan Hartman (MPIM): Does pseudo-isotopy imply isotopy?

Location: MPIM Lecture Hall

08.10.2024, 11:45-13:00: Low-dimensional topology seminar, Daniel Hartman (MPIM): Barbell diffeomorphisms and the Hatcher-Wagoner 2nd obstruction

Location: MPIM Lecture Hall

08.10.2024, 14:00-16:00: Seminar on Functor Calculi, Thomas Blom (MPIM): Introduction to Goodwillie calculus

Location: MPIM Seminar Room

08.10.2024, 14:15: Oberseminar Global Analysis and Operator Algebras, Brian Villegas Villalpando (University of Bonn): Fredholm Complexes of Hilbert C*-Modules

Location: Endenicher Allee 60, seminar room 0.008

Abstract: In this talk, Brian Villegas Villalpando will give the final presentation on the topic of his Master's thesis.

08.10.2024, 14:30-15:30: Number theory lunch seminar, Neelam Kandhil (University of Hongkong/MPIM): Relative class numbers and Euler-Kronecker constants of maximal real subfields

Location: MPIM Lecture Hall

09.10.2024, 10:00-11:00: Short talks by new postdocs

Location: MPIM Lecture Hall

09.10.2024, 11:30-12:30: Short talks by new postdocs

Location: MPIM Lecture Hall

10.10.2024, 15:00-16:00: MPI-Oberseminar, Dmitriy Rumynin (University of Warwick/MPIM): Symmetric spaces, where Topology meets Representation Theory

Location: MPIM Lecture Hall

11.10.2024, 10:15-12:00: Vorlesung, Peter Scholze (MPIM): Selected Topics in Algebra: The Habiro Ring of a Number Field

Location: MPIM Lecture Hall

11.10.2024, 14:05-14:30: Oberseminar Arithmetic Geometry and Representation Theory, Germain Stefanich (MPIM): Introductory talk

Location: MPIM Lecture Hall

11.10.2024, 14:30-15:00: Oberseminar Arithmetic Geometry and Representation Theory, Konstantinos Kartas (MPIM): Introductory talk

Location: MPIM Lecture Hall

15.10.2024, 14:15: Oberseminar Global Analysis and Operator Algebras, Badreddine Benhellal (University of Oldenburg): Curvature contribution to the essential spectrum of Dirac operators with critical shell interactions

Abstract: We discuss the spectral properties of three-dimensional Dirac operators with critical combinations of electrostatic and Lorentz scalar shell interactions supported by a compact smooth surface. It turns out that the criticality of the interaction may result in a new interval of essential spectrum. The position and the length of the interval are explicitly controlled by the coupling constants and the principal curvatures of the surface. This effect is completely new compared to lower dimensional critical situations or special geometries considered up to now, in which only a single new point in the essential spectrum was observed. Based on joint work with Konstantin Pankrashkin (Oldenburg).

Location: Endenicher Allee 60, seminar room 0.008

16.10.2024, Hausdorff Colloquium: Alexandros Eskenazis (CNRS, Sorbonne Université)

Location: Endenicher Allee 60, Lipschitz hall

Link

23.10.2024, Graduate Colloquium: TBA

Location: Endenicher Allee 60, Lipschitz hall

Link

30.10.2024, Hausdorff Colloquium: Volker Mehrmann (TU Berlin)

Location: Endenicher Allee 60, Lipschitz hall

Link

November 2024

04.11.-08.11.2024: Workshop: Analysis in TCS: testing, learning and complexity, HIM

Location: HIM lecture hall (Poppelsdorfer Allee 45, Bonn)

Link

06.11.2024, Graduate Colloquium: Johannes Linn (MPI)

Location: Endenicher Allee 60, Lipschitz hall

Link

18.11.-22.11.2024: Workshop: Information theory, Boolean functions and lattice problems, HIM

Location: HIM lecture hall (Poppelsdorfer Allee 45, Bonn)

Link

20.11.2024, Hausdorff Colloquium: Rupert Frank (Ludwig-Maximilians-Universität München)

Location: Endenicher Allee 60, Lipschitz hall

Link

27.11.2024, Graduate Colloquium: TBA

Location: Endenicher Allee 60, Lipschitz hall

Link

December 2024

03.12.2024, 14:15: Seminar of the CRC 1060, Michael Hinze (Universität Koblenz): Shape optimization with Lipschitz methods

Location: Endenicher Allee 60, Lipschitz Lecture Hall

Abstract: We present a general shape optimization framework based on the method of mappings in the Lipschitz topology. We propose and numerically analyse steepest descent and Newton-like minimisation algorithms for the numerical solution of the respective shape optimization problems. Our work is built upon previous work of the authors in (Deckelnick, Herbert, and Hinze, ESAIM: COCV 28 (2022)), where a Lipschitz framework for star-shaped domains is proposed. To illustrate our approach we present a selection of PDE constrained shape optimization problems and compare our findings to results from so far classical Hilbert space methods and recent p-approximations. This is joint work with Klaus Deckelnick from Magdeburg and Philip Herbert from Sussex.

11.12.2024, Hausdorff Colloquium: Matthew Kwan (Institute for Science and Technology Austria)

Location: Endenicher Allee 60, Lipschitz hall

Link

18.12.2024, Graduate Colloquium: TBA

Location: Endenicher Allee 60, Lipschitz hall

Link