On the Kauffman bracket skein module of (S^1 × S^2) # (S^1 × S^2)
arxiv(2024)
摘要
Determining the structure of the Kauffman bracket skein module of all
3-manifolds over the ring of Laurent polynomials ℤ[A^± 1] is a
big open problem in skein theory. Very little is known about the skein module
of non-prime manifolds over this ring. In this paper, we compute the Kauffman
bracket skein module of the 3-manifold (S^1 × S^2) # (S^1 ×
S^2) over the ring ℤ[A^± 1]. We do this by analysing the
submodule of handle sliding relations, for which we provide a suitable basis.
Along the way we also compute the Kauffman bracket skein module of (S^1 ×
S^2) # (S^1 × D^2). Furthermore, we show that the skein module of
(S^1 × S^2) # (S^1 × S^2) does not split into the sum of free
and (A^k-A^-k)-torsion modules, for each k≥ 1.
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