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Commensurability classification of certain right-angled Coxeter groups and related surface amalgams

Presented by: 
Emily Stark Technion - Israel Institute of Technology
Date: 
Thursday 12th January 2017 - 13:30 to 14:30
Venue: 
INI Seminar Room 1
Abstract: 
Co-authors: Pallavi Dani (Louisiana State University), Anne Thomas (University of Sydney)
 
I will describe the abstract commensurability classification within a class of hyperbolic right-angled Coxeter groups. I will explain the relationship between these groups and a related class of geometric amalgams of surface groups, and I will highlight the differences between the quasi-isometry classification and abstract commensurability classification in this setting. This is joint work with Pallavi Dani and Anne Thomas. 
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons