Seminar series
Date
Thu, 30 Apr 2009
Time
12:00 -
13:00
Location
SR1
Speaker
Oscar Randal-Williams
Organisation
Oxford
I will present a new proof of Mumford's conjecture on the rational cohomology of moduli spaces of curves, which is substantially different from those given by Madsen--Weiss and Galatius--Madsen--Tillmann--Weiss: in particular, it makes no use of Harer--Ivanov stability for the homology of mapping class groups, which played a decisive role in the previously known proofs. This talk represents joint work with Soren Galatius.