The Dolbeault geometric Langlands conjecture with nilpotent singular support

Let GG be a reductive group, let χπ1(G)\chi\in\pi_1(G) and let wZGw\in Z_G^{\vee}, where ZGZ_G is the center of GG. Let HiggsG(χ)\mathrm{Higgs}_G(\chi) denote the connected component of the Higgs stack corresponding to χ\chi, let N\mathcal{N} denote the nilpotent singular-support condition, and let ()w(-)_w denote the subcategory of central weight ww. Write BG\mathrm{B}_G for the relevant base of the Hitchin fibration and LG{}^{L}G for the Langlands dual group. Dolbeault geometric Langlands conjecture. There is a BG\mathrm{B}_G-linear equivalence

IndCohN(HiggsLG(w)ss)χIndLN(HiggsG(χ))w.\operatorname{IndCoh}_{\mathcal{N}}(\mathrm{Higgs}_{{}^{L}G}(w)^{\mathrm{ss}})_{-\chi} \simeq \operatorname{IndL}_{\mathcal{N}}(\mathrm{Higgs}_G(\chi))_w.

This is a nilpotent-singular-support version of the Dolbeault geometric Langlands correspondence, viewed as a classical limit of geometric Langlands. Its status is not resolved in the supplied text.

Sources & referencesView supporting material

Primary source

Yukinobu Toda, “The Dolbeault geometric Langlands correspondence for type A groups beyond the elliptic locus”, arXiv:2606.28878 (2026).

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