5/1/2008

Robert Lipshitz
Columbia University

HF-hat for 3-manifolds with boundary, via a toy example

We will start by sketching the nature of our extension of HF-hat to 3-manifolds with boundary. Following this, we will focus on a toy model, in terms of planar grid diagrams, in which the main aspects of the theory can be readily seen. We will conclude by mentioning the additional complications not present in the toy model. This is joint work with P. Ozsvath and D. Thurston.