MS Seminar (Mathematics - String Theory)

Speaker: Alexander Voronov (University of Minnesota)
Title: The n-category of cobordisms and TQFTs.
Date (JST): Mon, May 25, 2009, 15:30 - 17:00
Place: Seminar Room at IPMU Prefab. B
Abstract: Since Atiyah and Segal described the notions of Topological Quantum Field Theory (TQFT) and Conformal Field Theory (CFT), mathematicians have been looking for a suitable n-category framework to describe cobordisms with corners and a more general TQFT involving such cobordisms as a functor from that higher category of cobordisms with corners to a higher category of vector spaces. The problem deals with such standard difficulties of higher category theory as weak vs. strict axioms, coherence, suitable diagrams, etc.: almost every higher category theorist has this problem in the back of her head, but nobody seems to have gotten through to a satisfactory solution. In the talk, I will describe the set up Mark Feshbach and I have found.