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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…

Number Theory · Mathematics 2024-12-16 Daniel Le , Bao Viet Le Hung , Brandon Levin , Stefano Morra

Under some technical assumptions of a global nature, we establish the weight part of Serre's conjecture for mod $p$ Galois representations for CM fields that are tamely ramified and sufficiently generic at $p$.

Number Theory · Mathematics 2025-09-24 Daniel Le , Bao V. Le Hung

A generalization of Serre's Conjecture asserts that if $F$ is a totally real field, then certain characteristic $p$ representations of Galois groups over $F$ arise from Hilbert modular forms. Moreover it predicts the set of weights of such…

Number Theory · Mathematics 2017-12-13 Lassina Dembele , Fred Diamond , David P. Roberts

We formulate a Serre-type conjecture for n-dimensional Galois representations that are tamely ramified at p. The weights are predicted using a representation-theoretic recipe. For n = 3 some of these weights were not predicted by the…

Number Theory · Mathematics 2019-12-19 Florian Herzig

We prove the weight part of Serre's conjecture for Galois representations valued in $\mathrm{GSp}_4$ that are tamely ramified with explicit genericity at places above $p$ as conjectured by Herzig--Tilouine and Gee--Herzig--Savitt. This…

Number Theory · Mathematics 2025-10-07 Daniel Le , Bao V. Le Hung , Heejong Lee

We prove in generic situations that the lattice in a tame type induced by the completed cohomology of a $U(3)$-arithmetic manifold is purely local, i.e., only depends on the Galois representation at places above $p$. This is a…

Number Theory · Mathematics 2020-03-05 Daniel Le , Bao V. Le Hung , Brandon Levin , Stefano Morra

We show that the modular Serre weights of a sufficiently generic mod $p$ Galois representation of an unramified $p$-adic field are themselves generic, and give precise bounds on the genericity, by extending previous work of Emerton, Gee and…

Number Theory · Mathematics 2018-07-18 John Enns

Let F be a totally real field, and v a place of F dividing an odd prime p. We study the weight part of Serre's conjecture for continuous, totally odd, two-dimensional mod p representations rhobar of the absolute Galois group of F that are…

Number Theory · Mathematics 2015-06-10 Fred Diamond , David Savitt

We present a Serre-type conjecture on the modularity of four-dimensional symplectic mod p Galois representations. We assume that the Galois representation is irreducible and odd (in the symplectic sense). The modularity condition is…

Number Theory · Mathematics 2013-06-17 Florian Herzig , Jacques Tilouine

We consider mod $p$ Hilbert modular forms for a totally real field $F$, viewed as sections of automorphic line bundles on Hilbert modular varieties in prime characteristic $p$. For a Hecke eigenform of arbitrary weight, we prove the…

Number Theory · Mathematics 2025-12-03 Fred Diamond , Shu Sasaki

We study the weight part of (a generalisation of) Serre's conjecture for mod l Galois representations associated to automorphic representations on unitary groups of rank n for odd primes l. Given a modular Galois representation, we use…

Number Theory · Mathematics 2014-05-14 Thomas Barnet-Lamb , Toby Gee , David Geraghty

Let F be a totally real field and p an odd prime. If r is a continuous, semisimple, totally odd mod p representation of the absolute Galois group of F which is tamely ramified at all places of F dividing p, then we formulate a conjecture…

Number Theory · Mathematics 2007-12-30 Michael M. Schein

We study the possible weights of an irreducible 2-dimensional modular mod p representation of the absolute Galois group of F, where F is a totally real field which is totally ramified at p, and the representation is tamely ramified at the…

Number Theory · Mathematics 2010-09-16 Toby Gee , David Savitt

We prove a version of the weight part of Serre's conjecture for mod $p$ Galois representations attached to automorphic forms on rank 2 unitary groups which are non-split at $p$. More precisely, let $F/F^+$ denote a CM extension of a totally…

Number Theory · Mathematics 2022-12-21 Karol Koziol , Stefano Morra

Given a totally real number field $F$ and a mod $p$ Galois representation $\rho\colon G_F\to \mathrm{GL}_2(\bar{\mathbf{F}}_p)$, we propose an explicit definition of the set of Serre weights $W(\rho)$ attached to $\rho$. We prove that our…

Number Theory · Mathematics 2022-08-12 Misja F. A. Steinmetz

We establish a geometrisation of the Breuil-M\'ezard conjecture for potentially Barsotti-Tate representations, as well as of the weight part of Serre's conjecture, for moduli stacks of two-dimensional mod p representations of the absolute…

Number Theory · Mathematics 2025-02-05 Ana Caraiani , Matthew Emerton , Toby Gee , David Savitt

We study the weight part of (a generalisation of) Serre's conjecture for mod l Galois representations associated to automorphic representations on rank two unitary groups for odd primes l. We propose a conjectural set of Serre weights,…

Number Theory · Mathematics 2011-06-29 Thomas Barnet-Lamb , Toby Gee , David Geraghty

Let p be a prime and F a totally real field in which p is unramified. We consider mod p Hilbert modular forms for F, defined as sections of automorphic line bundles on Hilbert modular varieties of level prime to p in characteristic p. For a…

Number Theory · Mathematics 2022-11-15 Fred Diamond , Shu Sasaki

We generalize the main result of arXiv:1206.6631 [math.NT] to all totally real fields. In other words, for $p>2$ prime, we prove (under a mild Taylor-Wiles hypothesis) that if a modular representation is unramified and $p$-distinguished at…

Number Theory · Mathematics 2017-11-07 Payman L Kassaei

We prove that for forms of U(3) which are compact at infinity and split at places dividing a prime p, in generic situations the Serre weights of a mod p modular Galois representation which is irreducible when restricted to each…

Number Theory · Mathematics 2019-12-19 Matthew Emerton , Toby Gee , Florian Herzig
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