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Friday, February 17, 2017

3:00 pm   in 243 Altgeld Hall,  Friday, February 17, 2017
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Submitted by jjwen2.
 Lutian Zhao (UIUC Math)What is a Topological Quantum Field Theory?Abstract: In this talk we will introduce the physicists' definition of topological quantum field theory, mainly focusing on cohomological quantum field theory introduced by Witten. We will discuss topological twisting and see what topological invariant is actually computed. If time permits, we will see how Gromov-Witten invariants are constructed by physics.