Knot Floer homology and the Upsilon function
Date:
Wednesday, June 7, 2017 13:45 - 15:45
Speaker:
Andras Stipsicz (Alfréd Rényi Institute of Mathematics)
Location:
Big Seminar room Ground floor / Office Bldg West (I21.EG.101)
Series:
Mathematics and CS Seminar
Host:
Tamas Hausel
Contact:
DE ANTONI Jessica
Knot Floer homology (an invariant discovered by Peter Ozsvath and Zoltan Szabo around 2001) provides a number of invariants to study knots, links, and relations among them. The knot Floer chain complex (a slightly complicated algebraic object associated to a knot by the theory) can be used to define these numerical invariants. More recently, in a joint project with P. Ozsvath and Z. Szabo, we found a piecewise linear continuous function (the Upsilon-function of the knot) determined by the knot Floer chain complex. In the lecture I plan to review the most important knot invariants, starting with the Alexander polynomial. After the description of the knot Floer chain complex, I will outline the definition of the Upsilon function, and will present some simple applications.