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We prove a reciprocity law for one-dimensional compatible systems of mod p representations of absolute Galois groups of number fields. We prove that these arise from Hecke characters, and in particular recover by purely algebraic means the…

Number Theory · Mathematics 2007-05-23 Chandrashekhar Khare

We show how our p-adic method to compute Galois representations occurring in the torsion of Jacobians of algebraic curves can be adapted to modular curves. The main ingredient is the use of "moduli-friendly" Eisenstein series introduced by…

Number Theory · Mathematics 2021-05-20 Nicolas Mascot

We give a classification of irreducible admissible modulo $p$ representations of a split $p$-adic reductive group in terms of supersingular representations. This is a generalization of a theorem of Herzig.

Representation Theory · Mathematics 2019-02-20 Noriyuki Abe

In this note, we verify that several fundamental results from the theory of representations of reductive $p$-adic groups, extend to finite central extensions of these groups.

Representation Theory · Mathematics 2023-04-19 Eyal Kaplan , Dani Szpruch

We construct an Euler system for the adjoint Galois representation of a modular form, using motivic cohomology classes arising from Hilbert modular surfaces. We use this Euler system to give an upper bound for the Selmer group of the…

Number Theory · Mathematics 2025-03-18 David Loeffler , Sarah Livia Zerbes

We attempt to generalize the $p$-modular representation theory of finite groups to finite transporter categories, which are regarded as generalized groups. We shall carry on our tasks through modules of transporter category algebras, a type…

Representation Theory · Mathematics 2017-03-06 Fei Xu

Let k be an algebraically closed field of arbitrary characteristic,let K/k be a finitely generated field extension and let X be a separated scheme of finite type over K. For each prime ell, the absolute Galois group of K acts on the…

Number Theory · Mathematics 2013-10-16 Gebhard Boeckle , Wojciech Gajda an Sebastian Petersen

We study G-valued semi-stable Galois deformation rings where G is a reductive group. We develop a theory of Kisin modules with G-structure and use this to identify the connected components of crystalline deformation rings of minuscule…

Number Theory · Mathematics 2016-01-20 Brandon Levin

We studied framed deformations of two dimensional Galois representation of which the residue representation restrict to decomposition groups are scalars, and established a modular lifting theorem for certain cases. We then proved a family…

Number Theory · Mathematics 2008-04-02 Lin Chen

We introduce a cohomology set for groups defined by algebraic difference equations and show that it classifies torsors under the group action. This allows us to compute all torsors for large classes of groups. We also develop some tools for…

Algebraic Geometry · Mathematics 2016-07-26 Annette Bachmayr , Michael Wibmer

The smallest non-abelian p-groups play a fundamental role in the theory of Galois p-extensions. We illustrate this by highlighting their role in the definition of the norm residue map in Galois cohomology. We then determine how often these…

Number Theory · Mathematics 2016-10-21 Sunil Chebolu , Jan Minac , Andrew Schultz

In a previous article we introduced various moduli stacks of two-dimensional tamely potentially Barsotti-Tate representations of the absolute Galois group of a p-adic local field, as well as related moduli stacks of Breuil-Kisin modules…

Number Theory · Mathematics 2024-05-13 Ana Caraiani , Matthew Emerton , Toby Gee , David Savitt

Using the overconvergent cohomology modules introduced by Ash and Stevens, we construct eigenvarieties associated with reductive groups and establish some basic geometric properties of these spaces, building on work of Ash-Stevens, Urban,…

Number Theory · Mathematics 2014-12-05 David Hansen

Let $G$ be a connected reductive group over a totally real field $F$ which is compact modulo center at archimedean places. We find congruences modulo an arbitrary power of p between the space of arbitrary automorphic forms on $G(\mathbb…

Number Theory · Mathematics 2021-07-01 Jessica Fintzen , Sug Woo Shin

For each subgroup of GL_2(F_p) or order divisible by p, generated by (pseudo-)reflections, we compute the ideals of stable and generalized invariants. These groups and these ideals are related to the cohomology of compact Lie groups,…

Representation Theory · Mathematics 2016-06-30 Jaume Aguadé

Using the theory of $(\phi,\Gamma)$-modules and the formalism of Selmer complexes we construct the p-adic height for p-adic representations with coefficients in an affinoid algebra over $Q_p$.

Number Theory · Mathematics 2014-12-24 Denis Benois

We introduce a notion of inertial equivalence for integral $\ell$-adic representation of the Galois group of a global field. We show that the collection of continuous, semisimple, pure $\ell$-adic representations of the absolute Galois…

Number Theory · Mathematics 2021-06-10 Plawan Das , C. S. Rajan

A p-divisible group over a complete local domain determines a Galois representation on the Tate module of its generic fibre. We determine the image of this representation for the universal deformation in mixed characteristic of a…

Algebraic Geometry · Mathematics 2019-02-20 Eike Lau

For a $p$-adic local field $K$ with perfect residue field, L. Herr constructed a complex which computes the Galois cohomology of a $p$-torsion representation of the absolute Galois group of $K$ by using the theory of…

Number Theory · Mathematics 2008-04-24 Kazuma Morita

The main objective of this article is to establish the $p$-adic Artin formalism for the algebraic $p$-adic $L$-functions attached to the adjoint representations of Coleman families of modular forms. In particular, we prove a factorization…

Number Theory · Mathematics 2023-11-10 Fırtına Küçük
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