This opened up avenues of research linking knot theory and statistical mechanics.Edward Witten demonstrated that the Jones polynomial, and similar Jones-type invariants, had an interpretation in Chern–Simons theory.Viktor Vasilyev and Mikhail Goussarov started the theory of finite type invariants of knots.The coefficients of the previously named polynomials are known to be of finite type (after perhaps a suitable "change of variables").The graded Euler characteristic of the knot Floer homology of Peter Ozsváth and Zoltan Szabó is the Alexander polynomial.