The Satake compatibility conjecture for the spectral action

Let J\boldsymbol{J} be the algebra acting on the compactly supported cohomology of the Shimura variety, and let \operatorname{H}_c(\operatorname{Sh}_{\mu,\overline{\mathbb{F}}_v,\mathbb{Q}_\ell) denote that cohomology. The classical Satake isomorphism identifies J\boldsymbol{J} with the relevant spherical Hecke algebra. Satake compatibility conjecture. Under the Satake isomorphism, the action of J\boldsymbol{J} in the preceding theorem coincides with the usual Hecke algebra action on

Hc(Shμ,Fv,Q).\operatorname{H}_c^*(\operatorname{Sh}_{\mu,\overline{\mathbb{F}}_v},\mathbb{Q}_\ell).

This is presented as the analogue of V. Lafforgue's S=TS=T theorem and would identify the geometric spectral action with the classical Hecke action. The source gives no resolution.

Sources & referencesView supporting material

Primary source

Liang Xiao and Xinwen Zhu, “Cycles on Shimura varieties via geometric Satake”, arXiv:1707.05700 (2017).

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