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Department of Pure Mathematics and Mathematical Statistics

Given a group G acting on a CAT(0) polygonal complex, X, it is natural to ask whether the structure of X allows us to deduce properties of G, for example whether G has a codimension-1 subgroup (and so does not have Property (T)), the Haageruup property, or even if G is special. We discuss some recent work on local properties that X may possess which allow us to answer these questions.

Further information

Time:

29Jan
Jan 29th 2021
13:45 to 14:45

Venue:

Zoom https://maths-cam-ac-uk.zoom.us/j/95208706709

Speaker:

Calum Ashcroft (University of Cambridge)

Series:

Geometric Group Theory (GGT) Seminar