Donaldson-Thomas invariants

The third talk will address some attempts at categorifying Donaldson-
Thomas theory. This means that we will discuss how one might try to
construct a cohomology theory expressing Donaldson-Thomas invariants
as alternating sums of dimensions of cohomology groups. In
particular, we will construct a virtual de Rham complex for
intersections of Lagrangian submanifolds inside a symplectic manifold.