Geometry and Group Theory

GGT Seminar

The seminar consists mostly of presentations by the group members, with occasional talks by guests. People external to the group are also welcome to attend!

We meet weekly on Thursdays at 13:15, in SR 8.

Winter 2024

  • 16.01.2025 Marco Lotz - Unbounded reflection length and conjugacy
  • 19.12.2024 Raphael Appenzeller - Playing cops and robbers on Cayley graphs - connections to hyperbolicity
  • 12.12.2024 Bianca Marchionna - Invariants and zeta functions for totally disconnected locally compact groups
  • 03.12.2024 Isobel Davies - Complete CAT(0) Spaces with Apartment Systems
  • 28.11.2024 Dorian Chanfi (Gießen) - Polyhedral compactifications of Bruhat-Tits buildings
  • 21.11.2024 Raphael Appenzeller - What is an affine Lambda-building?
  • 14.11.2024 Maurice Reichert - Geometric Invariants and Asymptotics of Translation Surfaces
  • 07.11.2024 Bianca Marchionna - Tree structures on non-affine buildings
  • 24.10.2024 José Pedro Quintanilha - What is a quandle?
  • 10.10.2024 Marco Lotz - Reflection length in infinite non-affine Coxeter groups

Summer 2024

  • 18.07 Hamid Al-Saqban (Paderborn) - On the Unique Ergodicity for Foliations of Generic Abelian Differentials
  • 04.07 Carsten Peterson (Paderborn) - Degenerate Brion's formula and applications to symmetric spaces and affine buildings
  • 27.06 Matthias Uschold (Regensburg) - Mapping degree sets between manifolds
  • 20.06 Johannes Rau (Bogotá) - Real algebraic varieties close to non-singular tropical limits
  • 13.06 Sira Busch (Münster) - Projectivity Groups of Spherical Buildings
  • 16.05 Raphael Appenzeller (ETH Zürich) - Bridges between affine buildings and symmetric spaces
  • 15.04 Valentin Ovsienko (Reims) - q-deformed numbers: geometry and combinatorics
Last update on Jan 9, 2025 at 10:00 UTC
color-mode icon
home icon