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Stallings folds for CAT(0) cube complexes and quasiconvex subgroups

Presented by: 
Nir Lazarovich ETH Zürich
Date: 
Tuesday 10th January 2017 - 13:30 to 14:30
Venue: 
INI Seminar Room 1
Abstract: 
We describe a higher dimensional analogue of the Stallings folding sequence for group actions on CAT(0) cube complexes. We use it to give a characterization of quasiconvex subgroups of hyperbolic groups which act properly co-compactly on CAT(0) cube complexes via finiteness properties of their hyperplane stabilizers. Joint work with Benjamin Beeker.
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons