Betti-origin deformation conjecture for the annular Hecke functor

From papers

Let HW\sf{H}_W be the Hecke category, let AH:HWopMod2b(\bbAW)\sf{AH}:\sf{H}_W^{\operatorname{op}}\to\mathsf{Mod}_2^b(\bb{A}_W) be the annular Hecke functor, and let \bbAW,ϵ\bb{A}_{W,\epsilon} and \bbDν,ϵrat\bb{D}_{\nu,\epsilon}^{\operatorname{rat}} denote the deformed algebras. For periodic βBrW+\beta\in\mathit{Br}_W^+ of regular elliptic slope ν\nu, let Lν(1)L_\nu(1) be the simple rational DAHA module and let f\bm{f}_{\leq *} be its filtration. Betti-origin deformation conjecture. There is a flat deformation of AH\sf{AH} over Q[ϵ]\overline{\mathbf{Q}}_\ell[\epsilon] to a functor

AHϵ:HWopMod2b(\bbAW,ϵ)\sf{AH}_\epsilon:\sf{H}_W^{\operatorname{op}}\to\mathsf{Mod}_2^b(\bb{A}_{W,\epsilon})

such that the \bbAW\bb{A}_W-action extends to a weight-filtered \bbAW,ϵ\bb{A}_{W,\epsilon}-action for every object, and, for such β\beta, the action extends to a \bbDν,ϵrat\bb{D}_{\nu,\epsilon}^{\operatorname{rat}}-action, the specialization AH1(R(β))\sf{AH}_1(\cal{R}(\beta)) contains Lν(1)L_\nu(1) with multiplicity one, and the filtration f\bm{f}_{\leq *} arises from the difference of its two gradings. This is proposed as a conjectural deformation motivated by the expected nonabelian Hodge-type correspondence; no resolution is stated.

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Sources & referencesView supporting material

Primary source

Minh-Tâm Quang Trinh, “From the Hecke Category to the Unipotent Locus”, arXiv:2106.07444 (2021).

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