Calin Iuliu Lazaroiu (Trinity College Dublin)
calin@maths.tcd.ie
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.