Seminar series
Date
Tue, 27 May 2025
15:00
Location
L6
Speaker
Joe MacManus

Virtually planar groups (that is, those groups with a finite-index subgroup admitting a planar Cayley graph) exhibit many fairly unique coarse geometric properties. Often, we find that any one of these properties completely characterises this class of groups. 

In this talk, I will survey some characterisations of virtually planar/virtual surface groups. Among other things, I will sketch why any group which is QI to a planar graph is necessarily virtually planar. Time permitting, I will discuss an upcoming new characterisation of virtual surface groups in terms of their coarse geometry. 

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