Groups and Dynamics Seminar

Date: June 24, 2020

Time: 12:00PM - 1:00PM

Location: 940 9667 3668

Speaker: Nicolás Matte Bon, ETH Zürich

Title: A commutator lemma for confined subgroups and URS's and application to groups acting on rooted trees.

Abstract: I will explain a commutator lemma for confined subgroups and URSs of a group of homeomorphism, which generalizes to this setting a well-known lemma that relates normal subgroups of a group of homeomorphisms to the rigid stabilizers of the open sets of its action. Then we will focus on various application to weakly branch groups acting on rooted trees.