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This work presents author's explicit methods of constructing abelian extensions of complete discrete valuation fields. His approach to explicit equations of a cyclic extension of degree p^n which contains a given cyclic extension of degree…

Number Theory · Mathematics 2009-09-25 Igor Zhukov

We extend the loop algebra construction for algebras graded by abelian groups to study graded-simple algebras over the field of real numbers (or any real closed field). As an application, we classify up to isomorphism the graded-simple…

Rings and Algebras · Mathematics 2018-07-03 Yuri Bahturin , Mikhail Kochetov

We define the universal exponential extension of an algebraically closed differential field and investigate its properties in the presence of a nice valuation and in connection with linear differential equations. Next we prove normalization…

Commutative Algebra · Mathematics 2026-04-28 Matthias Aschenbrenner , Lou van den Dries , Joris van der Hoeven

Starting from a very general trace-form entropy, we introduce a pair of algebraic structures endowed by a generalized sum and a generalized product. These algebras form, respectively, two Abelian fields in the realm of the complex numbers…

Mathematical Physics · Physics 2013-02-22 A. M. Scarfone

The purpose of this paper is to introduce a cohomology theory for abelian matched pairs of Hopf algebras and to explore its relationship to Sweedler cohomology, to Singer cohomology and to extension theory. An exact sequence connecting…

Rings and Algebras · Mathematics 2007-05-23 L. Grunenfelder , M. Mastnak

This paper explores the cohomology of linear cycle sets, focusing on extensions of a specific linear cycle set H by an abelian group I. We derive explicit formulas for the second cohomology group, which classifies these extensions, and…

Group Theory · Mathematics 2025-01-16 Jorge Guccione , Juan José Guccione , Christian Valqui

Given a number field $K$ one associates to it the set $\Lambda_K$ of Dedekind zeta-functions of finite abelian extensions of $K$. In this short note we present a proof of the following Theorem: for any number field $K$ the set $\Lambda_K$…

Number Theory · Mathematics 2019-01-29 Pavel Solomatin

We investigate the large values of class numbers of cubic fields, showing that one can find arbitrary long sequences of "close" abelian cubic number fields with class numbers as large as possible. We also give a first step toward an…

Number Theory · Mathematics 2024-08-05 Jérémy Dousselin

Given an integral indefinite binary Hermitian form f over an imaginary quadratic number field, we give a precise asymptotic equivalent to the number of nonequivalent representations, satisfying some congruence properties, of the rational…

Number Theory · Mathematics 2010-04-20 Jouni Parkkonen , Frédéric Paulin

We classify the algebraic combinatorial geometries of arbitrary field extensions of transcendence degree greater than 4 and describe their groups of automorphisms. Our results and proofs extend similar results and proofs by Evans and…

Logic · Mathematics 2009-03-10 Jakub Gismatullin

We give a necessary and sufficient condition for a morphism between recollements of abelian categories to be an equivalence.

Category Theory · Mathematics 2007-05-23 Vincent Franjou , Teimuraz Pirashvili

The goal is to obtain an asymptotic formula for the number of quadratic extensions with bounded discriminant of a some quadratic number field with odd class number. This extends an already known result for Q.

Number Theory · Mathematics 2021-09-22 Alexandr Beneš

Building on Bosca's method, we extend to tame ray class groups the results on capitulation of ideals of a number field by composition with abelian extensions of a subfield first studied by Gras. More precisely, for every extension of number…

Number Theory · Mathematics 2020-04-09 Jean-François Jaulent

We undertake to develop a successful framework for commutative-associative hypercomplex numbers with the view to explicate and study associated geometric and generalized-relativistic concepts, basing on an interesting possibility to…

General Relativity and Quantum Cosmology · Physics 2007-05-23 D. G. Pavlov

We apply a symmetrization procedure to the setting of Jacobi expansions and study potential spaces in the resulting situation. We prove that the potential spaces of integer orders are isomorphic to suitably defined Sobolev spaces. Among…

Classical Analysis and ODEs · Mathematics 2016-05-03 Bartosz Langowski

We classify finite dimensional division real associative $\mathcal{Z}_2$-algebras, introduce composition $\mathcal{Z}_2$-algebras, and extend the Campbell-Baker-Hausdorff series and Lie correspondence in the context of linear Hu-Liu Leibniz…

Rings and Algebras · Mathematics 2007-05-23 Keqin Liu

In this paper, we study the theory of non-abelian extensions of a Leibniz conformal algebra $R$ by a Leibniz conformal algebra $H$ and prove that all the non-abelian extensions are classified by non-abelian $2$nd cohomology $H^2_{nab}(R,H)$…

Rings and Algebras · Mathematics 2025-04-02 Jun Zhao , Bo Hou , Xin Zhou

In this paper, we formulate and prove linear analogues of results concerning matchings in groups. A matching in a group G is a bijection f between two finite subsets A,B of G with the property, motivated by old questions on symmetric…

Number Theory · Mathematics 2012-08-15 Shalom Eliahou , Cedric Lecouvey

Jacobian conjectures (that nonsingular implies invertible) for rational everywhere defined maps of real n-space to itself are considered, with no requirement for a constant Jacobian determinant or a rational inverse. The associated…

Algebraic Geometry · Mathematics 2013-01-21 L. Andrew Campbell

We use results by Chenevier to interpolate the classical Jacquet-Langlands correspondence for Hilbert modular forms, which gives us an extension of Chenevier's results to totally real fields. From this we obtain an isomorphisms between…

Number Theory · Mathematics 2018-11-13 Christopher Birkbeck