Seminar by Nils Carqueville (University of Vienna)

Title: Equivariant completion in topological quantum field theory

2014.10.23 | Jane Jamshidi

Date Tue 20 Jan
Time 15:15 16:15
Location Aud-D3 (1531-215)

Abstract: Dividing out by the action of a group on some algebraic structure is a ubiquitous construction. In topological quantum field theory, where it appears in "orbifolding a symmetry", this leads to a natural generalisation called "equivariant completion". Equivariant completion is a simple, purely (bi)categorical construction which is informed by the fundamental role played by "line defects" in 2d TQFT. We shall introduce the basic ideas and results of this theory, and then apply it to Landau-Ginzburg models associated to simple singularities.