## 2009 Topology Seminar - 08

- Date: 03/19/2009

Lecturer(s):
Liam Watson (University of Quebec at Montreal)

Location:

University of British Columbia

Topic:

On two-fold branched covers, L-spaces, and Khovanov homology

Description:

Khovanov homology gives rise to a simple invariant of knots and links

taking values in the positive integers. Referred to as the width of a

link, this invariant is a measurement of the homology's support. In

general this quantity is not very well understood, though in relation

to two-fold branched covers of the 3-sphere, situations arise wherein

the width is quite well behaved. This talk will give some applications

of width resulting from this fact, and hint at some interaction with

L-spaces, a class of interesting manifolds that arise in Heegaard-Floer

homology.

Schedule:

3:00pm-4:00pm, WMAX 110