Outer Automorphisms of Hyperbolic Groups

24 February 2016
11:00
to
12:30
Alex Margolis
Abstract

I will talk about a remarkable theorem by Paulin, which says
that if a one-ended hyperbolic group has infinite outer automorphism
group, then it splits over a two-ended subgroup. In particular, this
gives a condition which ensures a hyperbolic group doesn't have property
(T).