Tianyi Zheng: Double commutator lemma for invariant random subgroups

Speaker: Tianyi Zheng

Title: Double commutator lemma for invariant random subgroups

Abstract:

We show a generalization of the double commutator lemma for normal subgroups to invariant random subgroups(IRS). This lemma allows a unified approach to classification of IRSs in several examples of groups acting by homeomorphisms on the Cantor set.