Colloquium: Nikita Rozenblyum (Chicago) - "String topology and noncommutative geometry"

A classical result of Goldman states that character variety of an oriented surface is a symplectic algebraic variety, and that the Goldman Lie algebra of free loops on the surface acts by Hamiltonian vector fields on the character variety. I will describe a vast generalization of these results, including to higher dimensional manifolds where the role of the Goldman Lie algebra is played by the Chas-Sullivan string bracket in the string topology of the manifold. These results follow from a general statement in noncommutative geometry. In addition to generalizing Goldman's result to string topology, we obtain a number of other interesting consequences including the universal Hitchin system on an algebraic curve. This is joint work with Chris Brav.

Date: 

Thu, 07/12/2017 - 14:30 to 15:30

Location: 

Manchester Building (Hall 2), Hebrew University Jerusalem