|
If M is an oriented 3–manifold, let S(M) denote the Homflypt
skein module of M. We show that S(M1#M2)
is isomorphic to S(M1)⊗S(M2) modulo
torsion. In fact, we show that S(M1#M2) is
isomorphic to S(M1)⊗S(M2) if we are working over a
certain localized ring. We show the similar result holds for relative
skein modules. If M contains a separating 2–sphere, we give
conditions under which certain relative skein modules of M vanish
over specified localized rings.
|