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Department of Mathematics,
Department of Mathematics,
University of California San Diego
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Topology Colloquium
Daniel Biss
University of Chicago
$K_g$ is not finitely generated
Abstract:
In joint work with Benson Farb, we show that $K_g$, a certain subgroup of the mapping class group of a genus $g$ surface, is not finitely generated. $K_g$ is the group generated by Dehn twists about null-homologous (separating) curves; it is also known as the kernel of the Johnson homomorphism out of the Torelli group. No background will be assumed.
Host: Nitya Kitchloo
December 7, 2005
2:00 PM
AP&M 6218
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