# CARMA Colloquium

## 4:00 pm

## Tuesday, 28^{th} Mar 2017

**V205, Mathematics Building**

# Dr Colin Reid

(CARMA, The University of Newcastle)
*Totally disconnected, locally compact groups*

Totally disconnected, locally compact (t.d.l.c.) groups are a large class of topological groups that arise from a few different sources, for instance as automorphism groups of a range of algebraic and combinatorial structures, or from the study of isomorphisms between finite index subgroups of a given group. A general theory has begun to emerge in recent years, based on the interaction between small-scale and large-scale structure in t.d.l.c. groups. I will give a survey of some ways in which these groups arise and some of the tools that have been developed for understanding them.