CARMA Seminar

4:00 pm

Thursday, 22nd Feb 2018

V205, Mathematics Building

Dr Alejandra Garrido

(The University of Newcastle)

Profinite completions of groups acting on rooted trees

Groups of rooted tree automorphisms, and (weakly) branch groups in particular, have received considerable attention in the last few decades, due to the examples with unexpected properties that they provide, and their connections to dynamics and automata theory. These groups also showcase interesting phenomena in profinite group theory. I will discuss some of these and other profinite completions that one can use to study these groups, and how to find them. All these concepts will be defined in the talk.