Divergence of wreath products and Houghton groups (Letizia Issini, UNIGE)

04.04.2023 10:30

Divergence of finitely generated groups is a quasi-isometry invariant that describes how difficult it is to connect two points in a Cayley graph of a group, avoiding a certain ball around the identity. It was defined by Gersten in 1994, when he gave the first example of a CAT(0)-group whose divergence is neither linear nor exponential. In this talk I will present the definition of divergence, mention some results about it, and focus on divergence of wreath products and Houghton groups

Lieu

Bâtiment: Conseil Général 7-9

Room 1-05, Tuesday 4.4.2023, Séminaire "Groupes et géométrie"

entrée libre