Gunningham–Safronov's derived skein–DT cohomology conjecture

Let qq be generic, let MM be a connected closed oriented 3-manifold, let LocG(M)\mathrm{Loc}_G(M) be its character stack, and let ϕLocG(M)\phi_{\mathrm{Loc}_G(M)} be its DT sheaf. Let SkG(M)\mathcal{S}\mathrm{k}_G(M) denote the derived skein module and HΔ\mathrm{H}^{\bullet}_{\Delta} renormalized cohomology.

Derived skein–DT conjecture. There is an isomorphism

H(SkG(M))HΔ(LocG(M),ϕLocG(M)).\mathrm{H}_\bullet(\mathcal{S}\mathrm{k}_G(M))\cong \mathrm{H}^{-\bullet}_{\Delta}(\mathrm{Loc}_G(M),\phi_{\mathrm{Loc}_G(M)}).

This conjecture is the proposed chain-level enhancement of the underived skein–DT comparison, with full derived skein homology recovering renormalized DT-sheaf cohomology. The source mentions partial evidence but does not state a resolution.

Sources & referencesView supporting material

Primary source

Chun-Yu Bai, “Derived skein module”, arXiv:2606.11122 (2026).

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