Montreal Geometric & Combinatorial Group Theory Seminar

Speaker: Inna Bumagin (McGill)

Title: “Every
countable group is an outer automorphism group”

Date: 3:30pm
Wednesday, October 2.

Room: 920 Burnside

Abstract:

I prove that for every countable group *G,* there is a finitely
generated group *N *such that* G **@** Out(N).*

Moreover, if *G* is finitely presented, the finitely generated
group *N* can be chosen to be residually finite!

The proofs employ small-cancellation theory. This is joint work with D.Wise.