Commensurations of subgroups of Out(FN)

A theorem of Farb and Handel [FH07] asserts that for N ≥ 4, the natural inclusion from Out(FN ) into its abstract commensurator is an isomorphism. We give a new proof of their result, which enables us to generalize it to the case where N = 3. More generally, we give sufficient conditions on a subgro...

Disgrifiad llawn

Manylion Llyfryddiaeth
Prif Awduron: Horbez, C, Wade, R
Fformat: Journal article
Iaith:English
Cyhoeddwyd: American Mathematical Society 2020