Harris–Viehmann conjecture for non-basic local Shimura varieties

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Assume that GG is quasi-split and let (G,[b],{μ})(G,[b],\{\mu\}) be a non-basic local Shimura datum. Let LL be a Levi subgroup, assume that JbJ_b is an inner form of a Levi subgroup contained in LL, and let PP be the corresponding parabolic subgroup with Levi factor LL. For each {μL′}∈Ib,{μ},L\{\mu'_L\}\in I_{b,\{\mu\},L}, let H∙((L,[b]L,{μL′}))[ρ]H^{\bullet}((L,[b]_L,\{\mu'_L\}))[\rho] be the associated Grothendieck-group element. Harris–Viehmann conjecture. In Groth(G(F)×WE{μ}){\rm Groth}(G(F)\times W_{E_{\{\mu\}}}),

H∙((G,[b],{μ}))[ρ]=Ind⁡P(F)G(F)(∑{μL′}∈Ib,{μ},LH∙((L,[b]L,{μL′}))[ρ]).H^{\bullet}((G,[b],\{\mu\}))[\rho]=\operatorname{Ind}^{G(F)}_{P(F)}\left(\sum_{\{\mu'_L\}\in I_{b,\{\mu\},L}}H^{\bullet}((L,[b]_L,\{\mu'_L\}))[\rho]\right).

The conjecture proposes an inducing formula for cohomology in the non-basic case, generalizing the expected behavior from Levi subdata. The source explicitly notes substantial scepticism and that even the precise prediction may need modification.

References

Primary source

Michael Rapoport and Eva Viehmann, “Towards a theory of local Shimura varieties”, arXiv:1401.2849 (2014).

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