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Over fields of characteristic zero, we determine all absolutely irreducible Yetter-Drinfeld modules over groups that have prime dimension and yield a finite-dimensional Nichols algebra. To achieve our goal, we introduce orders of braided…

Representation Theory · Mathematics 2024-04-12 I. Heckenberger , E. Meir , L. Vendramin

We prove an analog of Siegel's theorem for integral points in the context of Drinfeld modules. The result holds for finitely generated submodules of the additive group over a function field of transcendence dimension 1.

Number Theory · Mathematics 2007-05-23 Dragos Ghioca , Thomas J. Tucker

We establish a fundamental breakthrough in rank-one Drinfeld module arithmetic by deriving explicit formulas over the integral domain $\A = H^{0}(\mathbb{P}^1-P_{\rho}, \mathcal{O}_{\mathbb{P}^1})$, which generalizes the classical…

Number Theory · Mathematics 2026-05-11 Chuangqiang Hu , Xiao-Min Huang , Stephen S. -T. Yau

For any Drinfeld module of special characteristic p0 over a finitely generated field, we study the associated adelic Galois representation at all places different from p0 and \infty, and determine the image of the geometric Galois group up…

Number Theory · Mathematics 2012-01-31 Anna Devic , Richard Pink

We study the collection of group structures that can be realized as a group of rational points on an elliptic curve over a finite field (such groups are well known to be of rank at most two). We also study various subsets of this collection…

Number Theory · Mathematics 2010-03-16 William D. Banks , Francesco Pappalardi , Igor E. Shparlinski

This is a revision of the paper that was previously entitled "Weighted Completion of Galois Groups and Some Conjectures of Deligne". Fix a prime number $\l$. We prove a conjecture stated by Ihara, which he attributes to Deligne, about the…

Algebraic Geometry · Mathematics 2007-05-23 Richard Hain , Makoto Matsumoto

In this article, we study the properties of profinite geometric iterated monodromy groups associated to polynomials. Such groups can be seen as generic representations of absolute Galois groups of number fields into the automorphism group…

Dynamical Systems · Mathematics 2025-07-08 Mikhail Hlushchanka , Olga Lukina , Dean Wardell

We compute the Mordell-Weil groups of the modular Jacobian varieties of hyperelliptic modular curves $X_1(M, MN)$ over every number field which is the composition of quadratic fields. Also we prove criteria for the existence of elliptic…

Number Theory · Mathematics 2021-11-17 Koji Matsuda

We prove that certain fields have the property that their absolute Galois groups are free as profinite groups: the function field of a real curve with no real points; the maximal abelian extension of a 2-variable Laurent series field over a…

Algebraic Geometry · Mathematics 2007-05-23 David Harbater

We show that the automorphism group of Drinfeld's half-space over a finite field is the projective linear group of the underlying vector space. The proof of this result uses analytic geometry in the sense of Berkovich over the finite field…

Algebraic Geometry · Mathematics 2019-02-20 Bertrand RÉMY , Amaury Thuillier , Annette Werner

Twisted $L$-functions by Dirichlet characters offer deep insights into arithmetic geometry, especially in the study of elliptic curves and abelian varieties over number fields. In the function field setting, Drinfeld modules and Anderson…

Number Theory · Mathematics 2026-02-05 Jing Ye

We show that the module of integral points on a Drinfeld module satisfies a an analogue of Dirichlet's unit theorem, despite its failure to be finitely generated. As a consequence, we obtain a construction of a canonical finitely generated…

Number Theory · Mathematics 2010-08-02 Lenny Taelman

We show that for an elliptic curve E defined over a number field K, the group E(A) of points of E over the adele ring A of K is a topological group that can be analyzed in terms of the Galois representation associated to the torsion points…

Number Theory · Mathematics 2021-01-11 Athanasios Angelakis , Peter Stevenhagen

We study the action of the Galois group $G$ of a finite extension $K/k$ of number fields on the points on an elliptic curve $E$. For an odd prime $p$, we aim to determine the structure of the $p$-adic completion of the Mordell-Weil group…

Number Theory · Mathematics 2025-09-09 Thomas Vavasour , Christian Wuthrich

Let $K$ be an extension of $\mathbb{Q}$ and $A/K$ an elliptic curve. If $\mathrm{Gal}(\bar K/K)$ is finitely generated, then $A$ is of infinite rank over $K$. In particular, this implies the $g=1$ case of the Junker-Koenigsmann conjecture.…

Number Theory · Mathematics 2025-10-02 Bo-Hae Im , Michael Larsen

We study the lattice $\mathbf{tors}(A)$ of torsion pairs in the category $\mathrm{mod}(A)$ of finitely generated modules over an artinian ring $A$. It was shown by the authors in previous work that $\mathbf{tors}(A)$ is isomorphic to a…

Representation Theory · Mathematics 2026-02-18 Lidia Angeleri Hügel , Rosanna Laking , Francesco Sentieri

It is often stated that the Carlitz module is to the ring of univariate polynomials over a finite field what the multiplicative group is to the ring of integers. This analogy extends to the "rank 2" case, where Drinfeld modules play a role…

Number Theory · Mathematics 2023-06-26 Quentin Gazda , Damien Junger

We introduce the notion of differential torsors, which allows the adaptation of constructions from algebraic geometry to differential Galois theory. Using these differential torsors, we set up a general framework for applying patching…

Rings and Algebras · Mathematics 2017-10-09 Annette Bachmayr , David Harbater , Julia Hartmann , Michael Wibmer

We generalize a theorem of D. Rohrlich concerning root numbers of elliptic curves over the field of rational numbers. Our result applies to curves of all higher genera over number fields. Namely, under certain conditions which naturally…

Number Theory · Mathematics 2007-05-23 M. Sabitova

In this paper, we introduce an algebro-geometric formulation for Siegel's theorem using an improvement of Lang's version of Roth's theorem over finitely generated fields of characteristic zero. In fact, we prove that, for an affine open…

Number Theory · Mathematics 2015-04-21 Arash Rastegar