distinguished lecture series presents

###### Peter Ozsvath

### Princeton University

###### Research Area

Homology theory

###### Visit

Wednesday, June 6, 2018 to Friday, June 8, 2018

###### Location

MS 6627

distinguished lecture series presents

Homology theory

Wednesday, June 6, 2018 to Friday, June 8, 2018

MS 6627

An introduction to knot Floer homology: Knot Floer homology is an invariant for knots in three-dimensional space, defined using methods from symplectic geometry (the theory of pseudo-holomorphic curves). After giving some geometric motivation for its construction, I will sketch the construction of this invariant, and describe some of its key properties and applications. Knot Floer homology was originally defined in joint work with Zoltan Szabo, and independently by Jacob Rasmussen; but this lecture will touch on work of many others. This first lecture is intended for a general audience.

Bordered Floer homology: Bordered Floer homology is an invariant for three-manifolds with parameterized boundary. It associates a differential graded algebra to a surface, and certain modules to three-manifolds with specified boundary. I will describe properties of this invariant, with a special emphasis on its algebraic structure. Bordered Floer homology was defined in joint work with Dylan Thurston and Robert Lipshitz.

A bordered approach to knot Floer homology: I will describe current work with Zoltan Szabo, in which we compute a suitable specialization of knot Floer homology, using bordered techniques. The result is a purely algebraic formulation of knot Floer homology, which can be explicitly computed even for fairly large knots.

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