Geometric Langlands conjecture for generic normalized eigensheaves

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Let XX be the curve and GG the reductive group of the paper. Let EE be a Gˇ\check{G}-local system on XX, and put W=VEγW=V^{\gamma}_E. Assume that WW is irreducible and that whenever a Gˇ\check{G}-local system E′E' satisfies VE′γ≃VEγV^{\gamma}_{E'}\simeq V^{\gamma}_E, one has E′≃EE'\simeq E. Let dGd_G be the dimension shift used in the paper, let π:Yd→Bun⁡Gd\pi:{\cal Y}_d\to\operatorname{Bun}^d_G be the projection, let PW,ψd\mathcal P^d_{W,\psi} be the indicated perverse-sheaf complex, and let DK\mathbb D K denote Verdier duality. Geometric Langlands conjecture. There exists N>0N>0 and, for every d≥Nd\geq N, a nonempty open substack Ud⊂Bun⁡GdU_d\subset\operatorname{Bun}^d_G and an EE-Hecke eigensheaf KK on Bun⁡G\operatorname{Bun}_G such that both KK and DK\mathbb D K are generic normalized; π!PW,ψd∣Ud\pi_!\mathcal P^d_{W,\psi}|_{U_d} is in perverse degrees at most d−dGd-d_G, the map from the source induces an isomorphism Hd−dG(π!PW,ψd)≃K∣Ud\mathcal H^{d-d_G}(\pi_!\mathcal P^d_{W,\psi})\simeq K|_{U_d} on the top perverse cohomology sheaves; and KK is irreducible on every Bun⁡Gd\operatorname{Bun}^d_G and does not vanish over UdU_d. This predicts the existence and generic behavior of the desired geometric Langlands eigensheaf under the stated irreducibility and rigidity condition. The source gives no resolution, so the conjecture remains open.

References

Primary source

Sergey Lysenko, “On automorphic sheaves on Bun_G”, arXiv:math/0211067 (2003).

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