International Mathematics Research Notices Advance Access published online on September 3, 2009
International Mathematics Research Notices, doi:10.1093/imrn/rnp137
Elementary Combinatorics of the HOMFLYPT Polynomial
1 The Ohio State University, Mansfield, 1680 University Drive, Mansfield, OH 44906, USA
2 Department of Mathematics, Technion, Haifa 32000, Israel
Correspondence: Correspondence to be sent to: polyak{at}math.technion.ac.il
We explore Jaeger's state model for the HOMFLYPT polynomial. We reformulate this model in the language of Gauss diagrams and use it to obtain Gauss diagram formulas for a two-parameter family of Vassiliev invariants coming from the HOMFLYPT polynomial. These formulas are new already for invariants of degree 3.