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



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.