Ben-Zvi–Nadler's Betti geometric Langlands conjecture for nodal curves

Let Σ\Sigma be a compact Riemann surface, let GG be a reductive group, and let Gˇ\check{G} be its Langlands dual group. Write BunG(Σ)\operatorname{Bun}_G(\Sigma) for the moduli stack of principal GG-bundles on Σ\Sigma, and let LocsysGˇ(Σ)\operatorname{Locsys}_{\check{G}}(\Sigma) be the derived moduli stack of Betti Gˇ\check{G}-local systems on Σ\Sigma. Denote by N\mathcal{N} and Nˇ\check{\mathcal{N}} the nilpotent singular-support conditions on the two sides. Ben-Zvi–Nadler's Betti geometric Langlands conjecture. There is an equivalence of dg-categories

ShN(BunG(Σ))IndCohNˇ(LocsysGˇ(Σ)).\operatorname{Sh}_{\mathcal{N}}(\operatorname{Bun}_G(\Sigma))\simeq \operatorname{IndCoh}_{\check{\mathcal{N}}}(\operatorname{Locsys}_{\check{G}}(\Sigma)).

This is a categorical form of the Betti geometric Langlands correspondence, relating sheaves with nilpotent singular support on the moduli of GG-bundles to ind-coherent sheaves with nilpotent singular support on the moduli of dual-group local systems. The source attributes the proposal to Ben-Zvi and Nadler; its resolution status is not specified here.

Sources & referencesView supporting material

Primary source

Penghui Li, “Derived categories of character sheaves”, arXiv:1803.04289 (2018).

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