On the Torelli Lie algebra
On the Torelli Lie algebra
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Alexander Kupers, University of Toronto
Online Talk听
Zoom link:听
Passcode: 998749
I will explain a surprising link between diffeomorphism groups of high-dimensional manifolds听and mapping class groups of surfaces, which allows one to address two questions about the Torelli group:听whether its Lie algebra is stably Koszul, and whether the geometric Johnson homomorphism is stably听injective.
This is joint work with Oscar Randal-Williams.