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Contributed Talk - The low dimensional homology of Coxeter groups

Presented by: 
Rachael Boyd Norwegian University of Science and Technology
Date: 
Thursday 6th December 2018 - 15:00 to 15:30
Venue: 
INI Seminar Room 1
Abstract: 
Coxeter groups were introduced by Tits in the 1960s as abstractions of the finite reflection groups studied by Coxeter. Any Coxeter group acts by reflections on a contractible complex, called the Davis complex. This talk focuses on a computation of the first three integral homology groups of an arbitrary Coxeter group using an isotropy spectral sequence argument: the answer can be phrased purely in terms of the original Coxeter diagram. I will give an introduction to Coxeter groups and the Davis complex before outlining the proof.
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons