Zoom https://maths-cam-ac-uk.zoom.us/j/95208706709 2021-01-22 13:45: Stable commutator length on RAAGs (Nicolaus Heuer (University of Cambridge)) 2021-01-29 13:45: Cubulating groups acting on polygonal complexes (Calum Ashcroft (University of Cambridge)) 2021-02-05 13:45: Curve Graphs and Surface Diffeomorphism Groups (Sebastian Hensel (University of Munich)) 2021-02-12 13:45: An algebraic approach to residually nilpotency (Andrei Jaikin-Zapirain (Autonomous University of Madrid)) 2021-02-19 13:45: Some elementary correspondence in group theory (with applications to algebra/geometry) (D. B. McReynolds (Purdue University, Indiana)) 2021-02-26 13:45: Kaplansky's conjectures (Giles Gardam (University of Münster)) 2021-03-05 13:45: Super-expanders (Alexandros Eskenazis (University of Cambridge)) 2021-03-12 13:45: Rank gradient, cost, and simplicial volume (Clara Löh (Universät Regensburg)) 2021-05-07 13:45: Virtually unipotent elements of 3-manifold groups (Sami Douba (McGill University)) 2021-05-14 13:45: Algebraically hyperbolic groups (Alan Logan (Heriot-Watt University)) 2021-05-28 13:45: All finitely generated 3-manifold groups are Grothendieck rigid (Hongbin Sun (Rutgers)) 2021-06-04 13:45: Quasi-trees and product set growth (Alice Kerr (University of Oxford)) 2021-06-11 13:45: Geometric approximate group theory (Matt Cordes (ETH Zurich)) 2021-06-25 13:45: Combinatorics via Closed Orbits: Vertex Expansion and Graph Quantum Ergodicity (Amitay Kamber (University of Cambridge) ) 2021-10-15 13:45: The taut spectrum and the Eilenberg-Ganea problem (Luis Jorge Sanchez Saldana (UNAM)) 2021-10-29 13:45: Hyperplanes all over the place (Abdul Zalloum (Queen's University, Canada)) 2021-11-12 13:45: Parabolic subgroups of two-dimensional Artin groups and systolic-by-function complexes (Martín Blufstein (Universidad de Buenos Aires)) 2022-01-28 13:45: Title to be confirmed (Mikael de la Salle (Université de Lyon))