Manchester Geometry Seminar 2008/2009

Thursday 23 April 2009. The Frank Adams Room (Room 1.212), the Alan Turing Building. 4pm

Topological Defects and Bicategories

Calin Iuliu Lazaroiu (Trinity College Dublin)

Using a version of the Atiyah-Segal formalism, I show that two-dimensional topological field theories with defects can be described in terms of certain framed bicategories with duality. I also discuss applications of this construction to B-twisted Landau-Ginsburg models and to the B-type topological sigma models.