Safronov's root-of-unity skein conjecture

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Let MM be a closed 3-manifold, let qq be a good root of unity, and let G∨G^\vee be the metaplectic dual group. Let LocG∨(M)\mathrm{Loc}_{G^\vee}(M) be the character stack of G∨G^\vee-local systems on MM.

Safronov's root-of-unity skein conjecture. There is a line bundle Lq\mathcal{L}_q on LocG∨(M)\mathrm{Loc}_{G^\vee}(M) such that

SkG,q(M)≅H0(LocG∨(M),Lq).\mathrm{Sk}_{G,q}(M)\cong \mathrm{H}^0(\mathrm{Loc}_{G^\vee}(M),\mathcal{L}_q).

This is a root-of-unity analogue of the generic skein–DT sheaf comparison. The source attributes the conjecture to Pavel Safronov and gives no resolution.

References

Primary source

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

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