Wed, 11 Mar 2026

16:00 - 17:00
L6

A flat torus theorem for hierarchically hyperbolic spaces

Pénélope Azuelos
(University of Bristol)
Abstract
Various coarse and fine notions of non-positive curvature have proven extremely useful to the study of infinite finitely generated groups. One recurring feature of spaces with these properties is that the behaviour of abelian subgroups of their isometry groups is often highly restricted, via results known as flat torus theorems. One notion of coarse non-positive curvature which has proven to be very useful is hierarchical hyperbolicity. Spaces with this property include Gromov-hyperbolic groups, mapping class groups and compact special groups. I will discuss a new flat torus theorem in this setting and compare it to the classical result for CAT(0) spaces. This talk is based on joint work with Mark Hagen.
Wed, 18 Mar 2026
16:00
C3

Similarity Structure Groups with Prime Group von Neumann Algebras

Patrick Henry Debonis
(Purdue University)
Abstract

We will introduce a class of countable homeomorphism groups that share many properties with Thompson's group V, known as FSS* groups. This talk from Patrick Henry DeBonis will focus on some of the group constructions and deformation/rigidity arguments needed to prove FSS* group von Neumann algebras are prime - and have potential for wider applications.

Mon, 11 May 2026

15:30 - 16:30
L3

TBA

Prof. Greg Pavliotis
(Imperial)
Abstract

TBA

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Café π news - Spring & Summer Menu Refresh

The seasonal hot food menu has arrived, bringing fresh new flavours for the months ahead. 

Enjoy a variety of options including Lamb kofta, BBQ pulled pork bap, black sesame chicken skewer, roast corn, pepper & feta tacos, fish burger with mushy peas, Kung Pao chicken with egg fried rice and more. Only £6.50.

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