Ihara's lemma for Shimura curves with arbitrary weight
Ihara's lemma for Shimura curves with arbitrary weight
Let be a totally real field, let be a quaternion algebra over ramified at exactly one infinite place, and let be a finite place at which is unramified. Let be sufficiently small and unramified at , let contain , and let be the degeneracy maps. Let be the local system on attached to a finite-dimensional continuous -representation of . Ihara's lemma for arbitrary weight. For every non-Eisenstein maximal ideal of , the map
is injective. This is the expected Ihara lemma for Shimura curves with coefficients in arbitrary algebraic local systems; the constant-sheaf case is the weight-two specialization, and the statement remains conjectural in the generality considered here.
Sources & referencesView supporting material
Primary source
Jeff Manning and Jack Shotton, “Ihara's lemma for Shimura curves over totally real fields via patching”, arXiv:1907.06043 (2020).
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