Geometric Group Theory Seminar

Summer Semester 2023

Mondays, 16:15 in SRZ 216/217

Organizer: Giles Gardam

Date Speaker Title
8.5.2023 Claudio Llosa Isenrich (Karlsruhe)

Finiteness properties, subgroups of hyperbolic groups and complex hyperbolic lattices

15.5.2023 Agatha Atkarskaya (Hebrew University of Jerusalem) Small Cancellation theory for groups and rings
22.5.2023 Martina Conte (Düsseldorf) Finite axiomatizability of the rank and the dimension of a pro-π group
12.6.2023 Zachary Munro (McGill) via zoom Richly Branching Flats and Tubular Groups
19.6.2023 Mark Pengitore (Unviersity of Virginia) Characteristic quotients of surface groups and residual finiteness of mapping class groups


Winter Semester 2022/2023

Mondays, 16:15 in SRZ 216/217

Organizer: Tim de Laat

Date Speaker Title
17.10.2022 Jeroen Winkel Property (T) for bornological groups
31.10.2022 Romain Tessera (Paris) Quantitative orbit equivalence
14.11.2022 Sam Fairchild (Osnabrück) Counting pairs in discrete lattice orbits
28.11.2022 No seminar Group Actions: Dynamics, Measure, Topology
12.12.2022 Tim de Laat Actions of higher-rank Lie groups and lattices on uniformly convex Banach spaces
16.01.2023 Jonathan Fruchter (Oxford) Virtual homology and profinite rigidity
23.01.2023 Tom Ferragut (Montpellier) Rigidity of quasi-isometries and geometry of horospherical products.


Summer Semester 2022

Thursdays, 3-4pm in SRZ 216/217

Organizers: Sahana Balasubramanya and Federico Vigolo

Date Speaker Title
7.4.2022 Carlos de la Cruz Mengual (Weizmann Institute) Computing bounded cohomology via stabilization techniques
14.4.2022 Dawid Kielak (Oxford) Profinite recognition of fibring
21.4.2022 Rachel Skipper (Ohio State) Braiding Groups of Homeomorphisms of the Cantor Set
28.4.2022 Amandine Escalier (Münster) Building prescribed quantitative orbit equivalence
5.5.2022 Thomas Ng (Technion) Residually finite quotients of free products via relative cubulation
12.5.2022 Jacob Russel (Rice University) Purely pseudo-Anosov subgroups of fibered 3-manifold groups
2.6.2022 Xabier Legaspi (ICMAT) Constricting elements and the growth of quasi-convex subgroups
23.6.2022 Yannick Krifka (MPI Bonn) Volume bounds for the canonical lift complement of a random geodesic
30.6.2022 John Nicholson (Imperial) tba

Winter Semester 2021/2022

Thursdays, 3-4pm in SRZ 216/217

Organizers: Giles Gardam and Maria Gerasimova

Date Speaker Title
14.10.2021 Annette Karrer (Technion) The rigidity of lattices in products of trees
28.10.2021 Giles Gardam (Münster) Kaplansky's conjectures
11.11.2021 Ursula Hamenstädt (Bonn) A geometric boundary for the mapping class group
18.11.2021 Xiaolei Wu (Shanghai Center for Mathematical Sciences) via zoom Finiteness properties of asymptotic mapping class groups
25.11.2021 Simon André (Münster) Hyperbolic groups and elementary equivalence
2.12.2021 Sahana Balasubramanya (Münster) Actions of solvable groups on hyperbolic spaces
9.12.2021 Martin Nitsche (Karlsruhe) Computer proofs for property (T), and SDP duality
16.12.2021 Maria Gerasimova (Münster) Virtually free groups are Hilbert-Schmidt stable
13.1.2022 Vadim Alekseev (TU Dresden) Geometry of sofic approximations
20.1.2022 Tim de Laat (Münster) Origami expanders
27.1.2022 Maxime Gheysens (TU Freiberg) Half free, half direct