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Pré-Publication, Document De Travail Année : 2022

Extremal weights and a tameness criterion for mod $p$ Galois representations

Résumé

We study the weight part of Serre's conjecture for generic $n$-dimensional mod $p$ Galois representations. We first generalize Herzig's conjecture to the case where the field is ramified at $p$ and prove the weight elimination direction of our conjecture. We then introduce a new class of weights associated to $n$-dimensional local mod $p$ representations which we call \emph{extremal weights}. Using a ``Levi reduction" property of certain potentially crystalline Galois deformation spaces, we prove the modularity of these weights. As a consequence, we deduce the weight part of Serre's conjecture for unit groups of some division algebras in generic situations.
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Dates et versions

hal-03840799 , version 1 (06-11-2022)

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Daniel Le, Bao Viet Le Hung, Brandon Levin, Stefano Morra. Extremal weights and a tameness criterion for mod $p$ Galois representations. 2022. ⟨hal-03840799⟩
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