Date of Award


Document Type


Degree Name

Doctor of Philosophy (PhD)



First Advisor

Patrick Gilmer


Let k be a subring of the field of rational functions in x, v, s which contains x+/-1, v+/-1, s+/-1. If M is an oriented 3-manifold, let S(M) denote the Homflypt skein module of M over k. This is the free k-module generated by isotopy classes of framed oriented links in M quotiented by the Homflypt skein relations: (1) x --1L+ -- xL -- = (s -- s--1 )L0; (2) L with a positive twist = (xv--1)L; (3) L ⊔ O = u-u-1 s-s-1L where O is the unknot. We give two bases for the relative Homflypt skein module of the solid torus with 2 points in the boundary. The first basis is related to the monomial basis of S( S1 x D2) given by V. Turaev and also J. Hoste and M. Kidwell; the second basis is related to a Young idempotent basis for S(S 1 x D2) based on the work of A. Aiston, H. Morton and C. Blanchet. We prove that if the elements s2n -- 1, for n a nonzero integer, and the elements s2m -- upsilon 2, for any integer m, are invertible in k, then S(S1 x S2) = k-torsion module ⊕ k. Here the free part is generated by the empty link &phis;. In addition, if the elements s2m -- upsilon 4, for m an integer, are invertible in k , then S(S1 x S2) has no torsion. We also obtain some results for more general k.