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Equivariant completion in topological quantum field theory

Nils Carqueville
(University of Vienna)
Seminar
Tirsdag, 20 januar, 2015, at 15:15-16:15, in Aud. D3 (1531-215)
Abstrakt:
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.
Organiseret af: QGM
Kontaktperson: Jørgen Ellegaard Andersen