捆绑SM社区

Event

Sami Douba (捆绑SM社区)

Wednesday, September 15, 2021 15:00to16:00
Burnside Hall Room 920, 805 rue Sherbrooke Ouest, Montreal, QC, H3A 0B9, CA

The Geometric Group Theory Seminar

Title: Proper CAT(0) actions of unipotent-free linear groups

Abstract: Button observed that finitely generated linear groups containing no nontrivial unipotent matrices behave much like groups admitting proper actions by semisimple isometries on complete CAT(0) spaces. It turns out that any finitely generated linear group possesses an action on such a space whose restrictions to unipotent-free subgroups are in some sense tame. We discuss this phenomenon and some of its implications for the representation theory of certain 3-manifold groups.

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