A combinatorial spanning tree model for delta-graded knot Floer homology

Geometry Topology Seminar
Monday, April 18, 2011 - 2:20pm for 1 hour (actually 50 minutes)
Skiles 006
John Baldwin – Princeton
John Etnyre
I'll describe a new combinatorial method for computing the delta-graded knot Floer homology of a link in S^3. Our construction comes from iterating an unoriented skein exact triangle discovered by Manolescu, and yields a chain complex for knot Floer homology which is reminiscent of that of Khovanov homology, but is generated (roughly) by spanning trees of the black graph of the link. This is joint work with Adam Levine.