Equivariant adjoint L-value congruence conjecture for Hilbert modular forms

Let FF be the totally real field, let SS be the set of places dividing the level and pp, and let E/FE/F be a totally real abelian extension ramified away from SS or at pp. Set AE=O[Gal(E/F)]A_E=O[\operatorname{Gal}(E/F)], let fE\wp_{f_E} be the relevant congruence ideal, and let LEan(ad(ρf)){\mathcal L}^{\operatorname{an}}_E(\operatorname{ad}(\rho_f)) be the equivariant adjoint LL-value formed from the twisted special values and character idempotents. Equivariant adjoint L-value congruence conjecture. For every such E/FE/F:

LEan(ad(ρf))AE,{\mathcal L}^{\operatorname{an}}_E(\operatorname{ad}(\rho_f))\in A_E,

LEan(ad(ρf)){\mathcal L}^{\operatorname{an}}_E(\operatorname{ad}(\rho_f)) annihilates fE/fE2\wp_{f_E}/\wp_{f_E}^2, belongs to the Fitting ideal of fE/fE2\wp_{f_E}/\wp_{f_E}^2 over AEA_E, and generates that Fitting ideal over AEA_E. The four assertions are presented together as an equivariant formulation of the congruence number formula established by Hida; the supplied text does not state that they are resolved.

Sources & referencesView supporting material

Primary source

Eric Urban, “On Euler systems for adjoint Hilbert modular Galois representations”, arXiv:2102.06305 (2021).

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