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In this paper, we will calculate the number of Galois extensions of local fields with Galois group A_n and S_n.

Number Theory · Mathematics 2022-07-15 Chungan Ji , Dasheng Wei

In this paper we find the genus field of finite abelian extensions of the global rational function field. We introduce the term conductor of constants for these extensions and determine it in terms of other invariants. We study the…

Let $G$ be a finite abelian $p$-group. We count \'etale $G$-extensions of global rational function fields $\mathbb F_q(T)$ of characteristic $p$ by the degree of what we call their Artin-Schreier conductor. The corresponding (ordinary)…

Number Theory · Mathematics 2025-07-23 Fabian Gundlach

We derive an asymptotic formula which counts the number of abelian extensions of prime degrees over rational function fields. Specifically, let $\ell$ be a rational prime and $K$ a rational function field $\Bbb F_q(t)$ with $\ell \nmid q$.…

Number Theory · Mathematics 2015-09-07 Chih-Yun Chuang , Yen-Liang Kuan

We determine the asymptotic growth of extensions of local function fields of characteristic p counted by discriminant, where the Galois group is a subgroup of the affine group AGL_1(p). More general, we solve the corresponding counting…

Number Theory · Mathematics 2026-04-03 Jürgen Klüners , Raphael Müller

We study the groups in the unit filtration of a finite abelian extension K of the field of p-adic numbers. We determine explicit generators of these groups as modules over the pro-p group ring of the Galois group of K over the p-adic…

Number Theory · Mathematics 2014-02-18 Romyar T. Sharifi

The article at hand contains exact asymptotic formulas for the distribution of conductors of abelian p-extensions of global function fields of characteristic p. These yield a new conjecture for the distribution of discriminants fueled by an…

Number Theory · Mathematics 2014-11-12 Thorsten Lagemann

By Langlands and Deligne we know that the local constants are extendible functions. Therefore, to give an explicit formula of the local constant of an induced representation of a local Galois group of a non-Archimedean local field $F$ of…

Number Theory · Mathematics 2017-10-12 Sazzad Ali Biswas

Brumer and Kramer gave bounds on local conductor exponents for an abelian variety $A/\mathbb Q$ in terms of the dimension of $A$ and the localization prime $p$. Here we give improved bounds in the case that $A$ has maximal real…

Number Theory · Mathematics 2025-04-23 Kimball Martin

Let $G$ be a Frobenius group with an abelian Frobenius kernel $F$ and let $k$ be a finite extension of $\mathbb{Q}$. We obtain an upper bound for the number of degree $|F|$ algebraic extensions $K/k$ with Galois group $G$ with the norm of…

Number Theory · Mathematics 2019-11-04 Harsh Mehta

We provide a characterization of infinite algebraic Galois extensions of the rationals with uniformly bounded local degrees, giving a detailed proof of all the results announced in a paper by Checcoli and Zannier and obtaining relevant…

Number Theory · Mathematics 2011-10-03 Sara Checcoli

We show that for a large class of finite groups G, the number of Galois extensions E/Q of group G and discriminant $|d_E|\leq y$ grows like a power of $y$ (for some specified exponent). The groups G are the regular Galois groups over Q and…

Number Theory · Mathematics 2014-04-17 Pierre Dèbes

Let $k$ be a number field. We provide an asymptotic formula for the number of Galois extensions of $k$ with absolute discriminant bounded by some $X \geq 1$, as $X\to\infty$. We also provide an asymptotic formula for the closely related…

Number Theory · Mathematics 2024-06-07 Robert J. Lemke Oliver

Let $\ell\geq 5$ be a prime number and $\mathbb{F}_\ell$ denote the finite field with $\ell$ elements. We show that the number of Galois extensions of the rationals with Galois group isomorphic to $GL_2(\mathbb{F}_\ell)$ and absolute…

Number Theory · Mathematics 2025-06-06 Anwesh Ray

We count abelian number fields ordered by arbitrary height function whose generator of tame inertia is restricted to lie in a given subset of the Galois group, and find an explicit formula for the leading constant. We interpret our results…

Number Theory · Mathematics 2025-07-02 Julie Tavernier

We determine in this paper the distribution of the number of points on the covers of $\mathbb{P}^1(\mathbb{F}_q)$ such that $K(C)$ is a Galois extension and $\mbox{Gal}(K(C)/K)$ is abelian when $q$ is fixed and the genus, $g$, tends to…

Number Theory · Mathematics 2017-12-15 Patrick Meisner

An old open problem in number theory is whether Chebotarev density theorem holds in short intervals. More precisely, given a Galois extension $E$ of $\mathbb{Q}$ with Galois group $G$, a conjugacy class $C$ in $G$ and an $1\geq…

Number Theory · Mathematics 2024-10-15 Lior Bary-Soroker , Ofir Gorodetsky , Taelin Karidi , Will Sawin

We study the relationship between the local and global Galois theory of function fields over a complete discretely valued field. We give necessary and sufficient conditions for local separable extensions to descend to global extensions, and…

Rings and Algebras · Mathematics 2018-10-24 David Harbater , Julia Hartmann , Daniel Krashen , R. Parimala , V. Suresh

We study the distribution of extensions of a number field $k$ with fixed abelian Galois group $G$, from which a given finite set of elements of $k$ are norms. In particular, we show the existence of such extensions. Along the way, we show…

Number Theory · Mathematics 2024-04-18 Christopher Frei , Daniel Loughran , Rachel Newton , Yonatan Harpaz , Olivier Wittenberg

Let $L/K$ be a Galois extension of number fields. We prove two lower bounds on the maximum of the degrees of the irreducible complex representations of ${\rm Gal}(L/K)$, the sharper of which is conditional on the Artin Conjecture and the…

Number Theory · Mathematics 2016-01-20 Jeremy Rouse , Frank Thorne
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