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The $T-$modules, introduced by G. Anderson in the '80s, are the natural analogue of abelian varieties in Function Field Arithmetic in positive characteristic. For a special class of them we highlight that a totally similar description of…

Number Theory · Mathematics 2018-03-22 Luca Demangos

Compared with algebraic varieties the local monodromy of Drinfeld modules appears to be hopelessly complex: The image of the wild inertia subgroup under Tate module representations is infinite save for the case of potential good reduction.…

Number Theory · Mathematics 2024-12-11 M. Mornev

For a fixed mod $p$ automorphic Galois representation, $p$-adic automorphic Galois representations lifting it determine points in universal deformation space. In the case of modular forms and under some technical conditions, B\"{o}ckle…

Number Theory · Mathematics 2018-01-30 Patrick B. Allen

Let $P$ be a monic prime of $\mathbb F_q[\theta]$, we define the $P$-adic $L$-series associated with Anderson $t$-modules and prove a $P$-adic class formula \`a la Taelman linking a $P$-adic regulator, the class module and a local factor at…

Number Theory · Mathematics 2025-04-08 Alexis Lucas

Let $q = p^e \geq 7$ be an odd prime power, and set $A := \mathbb{F}_q[T]$. In this article, we construct an infinite two-parameter family of Drinfeld $A$-modules of rank $3$ such that, for every non-zero prime ideal $\mathfrak{l}$ of $A$,…

Number Theory · Mathematics 2025-10-07 Narasimha Kumar , Dwipanjana Shit

We prove new modularity lifting theorems for p-adic Galois representations in situations where the methods of Wiles and Taylor--Wiles do not apply. Previous generalizations of these methods have been restricted to situations where the…

Number Theory · Mathematics 2017-07-18 Frank Calegari , David Geraghty

We introduce and study a natural class of Anderson t- modules, called triangular t-modules, characterized by having Drinfeld modules as their $\tau$-composition factors. They form a homologically meaningful generalization of Drinfeld…

Number Theory · Mathematics 2025-12-09 Dawid E. Kędzierski , Piotr Krasoń

Pure t-motives were introduced by G. Anderson as higher dimensional generalizations of Drinfeld modules, and as the appropriate analogs of abelian varieties in the arithmetic of function fields. In order to construct moduli spaces for pure…

Number Theory · Mathematics 2014-01-28 Matthias Bornhofen , Urs Hartl

We study $p$-adic Hodge theory for families of Galois representations over pseudorigid spaces. Such spaces are non-archimedean analytic spaces which may be of mixed characteristic, and which arise naturally in the study of eigenvarieties at…

Number Theory · Mathematics 2022-11-07 Rebecca Bellovin

We show that the moduli problem of deformations of nilpotent displays by quasi-isogenies is representable, without using $p$-divisible groups. The main ingredients are Artin's criterion and the theory of truncated displays. This gives in…

Algebraic Geometry · Mathematics 2024-04-17 Sebastian Bartling , Manuel Hoff

In the arithmetic of function fields Drinfeld modules play the role that elliptic curves take on in the arithmetic of number fields. As higher dimensional generalizations of Drinfeld modules, and as the appropriate analogues of abelian…

Number Theory · Mathematics 2014-01-28 Matthias Bornhofen , Urs Hartl

Associated to an abelian variety over a number field are several interesting and related groups: the motivic Galois group, the Mumford-Tate group, $\ell$-adic monodromy groups, and the Sato-Tate group. Assuming the Mumford-Tate conjecture,…

Number Theory · Mathematics 2020-09-17 David Zywina

We provide explicit generators and relations for the affine Kac-Moody groups, as well as a realization of them as (twisted) loop groups by means of Galois descent considerations.

Group Theory · Mathematics 2022-12-21 Jun Morita , Arturo Pianzola , Taiki Shibata

As a generalization of Drinfeld modules, Greg Anderson introduced abelian t-modules and t-motives over a perfect field. In this article we study relative versions of these over rings. We investigate isogenies among them. Our main results…

Number Theory · Mathematics 2017-06-22 Urs Hartl

In this paper, we prove the equality between the transcendental degree of the field generated by the v-adic periods of a t-motive M and the dimension of the Tannakian Galois group for M, where v is a "finite" place of the rational function…

Number Theory · Mathematics 2011-06-01 Yoshinori Mishiba

Let M be a 1-motive defined over a field of characteristic 0. To M we can associate its motivic Galois group, G_mot(M), which is the geometrical interpretation of the Munford-Tate group of M. We prove that the unipotent radical of the Lie…

Number Theory · Mathematics 2012-06-14 Cristiana Bertolin

The present article aims to provide a brief account of the theories of Drinfeld modules and Anderson's $t$-modules and $t$-motives. As such the article is not meant to be comprehensive, but we have endeavored to summarize aspects of the…

Number Theory · Mathematics 2025-07-08 W. Dale Brownawell , Matthew A. Papanikolas

Let F be a number field with adele ring A_F, and \pi an isobaric, algebraic automorphic representation of GL_4(A_F) of a fixed archimedean weight, which is quasi-regular, meaning that at every archimedean place v of F, the 4-dimensional…

Number Theory · Mathematics 2013-12-12 Dinakar Ramakrishnan

We develop a notion of exponential motives on general prestacks equipped with a $\mathbf{G}_a$-action, and compare them with Whittaker motives via Gaitsgory's Kirillov model. We then establish foundational results for exponential motives on…

Algebraic Geometry · Mathematics 2026-03-25 Robert Cass , Thibaud van den Hove , Jakob Scholbach

Let $p\geq 7$ be a prime and $n>1$ be a natural number. We show that there exist infinitely many Galois representations $\varrho:Gal(\bar{\mathbb{Q}}/\mathbb{Q})\rightarrow GL_{n}(\mathbb{Z}_p)$ which are unramified outside $\{p, \infty\}$…

Number Theory · Mathematics 2023-09-08 Anwesh Ray