Jonathan Gabriel Fabiszisky (Disputation): Analysis of optimal designs in two-dimensional compliance minimization problems

Oberseminar p-adische Arithmetik: p-adic Deligne-Lusztig theory: Joao Lourenco: Generic Mackey formula

Thorben Kastenholz (KIT): Non Vanishing of the Fourth Bounded Cohomology of Free Groups and Codimension 2 Subspaces

Abstract: Bounded cohomology is a powerful albeit very hard to compute invariant. Nothing encapsulates that more than the as of yet mysterious bounded cohomol...

Oberseminar Differentialgeometrie: Frieder Jäckel (Universität Bonn), Vortrag: Closed Einstein manifolds of negative curvature

Abstract: We show that in every dimension at least four there exist infinitely many closed manifolds that admit an Einstein metric with negative sectional cur...

Mittagsseminar zur Arithmetik: Ulrich Görtz (Universität Duisburg-Essen): Integral Hecke Correspondences

Hecke operators are an indispensable tool to understand the structure of spaces of classical modular forms, and more generally of the cohomology of automorphic...

Jan Kruschewski (Disputation): Inner Model Theory and Kripke-Platek Set Theory

Tea Seminar: Bianca Firmbach (University of Muenster): Parabolic subgroups of large-type Artin groups

Artin groups generalize braid groups and are closely related to Coxeter groups, yet their structure and geometry remain less well understood. A recent geometric...

Soham Chakraborty (ENS Paris): Measured groupoids beyond groups and group actions. Oberseminar C*-Algebren.

In the theory of von Neumann algebras, some of the most important classes of examples come from discrete countable groups, their actions on measure spaces, and...