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Cohomology of braid groups and mapping class groups I

Presented by: 
O Randal-Williams University of Cambridge
Date: 
Thursday 28th February 2013 - 14:00 to 16:00
Venue: 
INI Seminar Room 1
Abstract: 
I will explain how "group completion" techniques lead to a description of the cohomology of braid groups(=spaces of configurations in the plane) and mapping class groups(=moduli spaces of Riemann surfaces). I hope to explain the method completely for braid groups, and indicate what one needs to worry about for mapping class groups. I will then survey explicit calculational information which can be obtained from this method (and others).
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University of Cambridge Research Councils UK
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