Conjecture on free and torsion decompositions of Kauffman bracket skein modules

Let MM be a closed, oriented 33-manifold, and let S(M)\mathscr S(M) denote its Kauffman bracket skein module over Z[A±1]\mathbb Z[A^{\pm1}]. A module decomposition into free modules and torsion modules means a direct-sum decomposition of that form. Free–torsion decomposition conjecture.

  1. The Kauffman bracket skein module of any closed, prime, oriented 33-manifold over Z[A±1]\mathbb Z[A^{\pm1}] can be decomposed into the direct sum of free modules and torsion modules.
  2. The Kauffman bracket skein module of any non-prime, oriented 33-manifold over Z[A±1]\mathbb Z[A^{\pm1}] cannot be decomposed into the direct sum of free modules and torsion modules.

The supplied text attributes this two-part claim to prior work and gives no evidence resolving either assertion, so both remain open here.

Sources & referencesView supporting material

Primary source

Rhea Palak Bakshi, Thang T. Q. Lê and Józef H. Przytycki, “Kauffman bracket skein module of the connected sum of two solid tori”, arXiv:2604.09971 (2026).

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