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We provide a clarification of the classification of two-dimensional algebras over an arbitrary base field. Using this clarification, we determine the number of non-isomorphic two-dimensional algebras over a finite field.

Rings and Algebras · Mathematics 2026-05-26 U. Bekbaev

For any finite field $\mathbb{F}$ and any positive integer $n$ we count the number of monic polynomials of degree $n$ over $\mathbb{F}$ with nonzero constant coefficient and a self-reciprocal factor of any specified degree. An application…

Number Theory · Mathematics 2022-10-31 Geoffrey Price , Katherine Thompson

We give a survey of recent results related to the problem of characterizing finite-dimensional division algebras by the set of isomorphism classes of their maximal subfields. We also discuss various generalizations of this problem and some…

Rings and Algebras · Mathematics 2015-06-11 Vladimir I. Chernousov , Andrei S. Rapinchuk , Igor A. Rapinchuk

In this paper we define a pair of faithful functors that map isomorphic and isotopic finite-dimensional algebras over finite fields to isomorphic graphs. These functors reduce the cost of computation that is usually required to determine…

Rings and Algebras · Mathematics 2017-02-08 O. J. Falcón , R. M. Falcón , J. Núñez , A. M. Pacheco , M. T. Villar

We classify fields having finitely many finite non-commutative (not necessarily central) division algebras over them. In the process, we introduce the notion of anti-closure of a field and also make comments on fields having a linear…

Rings and Algebras · Mathematics 2023-09-18 Snehinh Sen

Let $\Lambda$ be a finite dimensional algebra over an algebraically closed field $k$. We survey some results on algebras of finite global dimension and address some open problems.

Representation Theory · Mathematics 2012-09-11 Dieter Happel , Dan Zacharia

This paper is concerned with the problem of determining the number of division algebras which share the same collection of finite splitting fields. As a corollary we are able to determine when two central division algebras may be…

Rings and Algebras · Mathematics 2010-01-22 Daniel Krashen , Kelly McKinnie

We consider various counting questions for irreducible binomials over finite fields. We use various results from analytic number theory to investigate these questions.

Number Theory · Mathematics 2017-07-12 Randell Heyman , Igor E. Shparlinski

In this paper, we give algorithms for determining the existence of isomorphism between two finite-dimensional Lie algebras and compute such an isomorphism in the affirrmative case. We also provide algorithms for determining algebraic…

Rings and Algebras · Mathematics 2021-02-23 Tuan A. Nguyen , Vu A. Le , Thieu N. Vo

Fixed point subalgebras of finite dimensional factor algebras of algebras of polynomials in n indeterminates over the finite field $\mathbb F_2$ (with respect to all $\mathbb F_2$-algebra automorphisms) are fully described.

Rings and Algebras · Mathematics 2012-09-04 Miroslav Kureš

A finite-dimensional unital and associative algebra over $\mathbb{R}$, or what we shall call simply "an algebra" in this paper for short, generalities the construction by which we derive the complex numbers by "adjoining an element $i$" to…

Rings and Algebras · Mathematics 2017-08-04 Nathan BeDell

In the paper we provide some polynomial identities for finite-dimensional algebras. A list of well known single polynomial identities is exposed and the classification of all $2$-dimensional algebras with respect to these identities is…

Rings and Algebras · Mathematics 2020-01-03 H. Ahmed , U. Bekbaev , I. Rakhimov

We provide non-isomorphic finite 2-groups which have isomorphic group algebras over any field of characteristic 2, thus settling the Modular Isomorphism Problem.

Rings and Algebras · Mathematics 2021-12-16 Diego García , Leo Margolis , Ángel del Río

The work is devoted to the variety of $2$-dimensional algebras over an algebraically closed field. Firstly, we classify such algebras modulo isomorphism. Then we describe the degenerations and the closures of principal algebra series in the…

Rings and Algebras · Mathematics 2020-04-03 Ivan Kaygorodov , Yury Volkov

We construct a nil algebra over a countable field which has finite but non-zero Gelfand-Kirillov dimension.

Rings and Algebras · Mathematics 2007-05-23 T H Lenagan , Agata Smoktunowicz

This paper addresses the classification problem of associative algebras over arbitrary base fields. We present a list of three-dimensional associative algebras with canonical representatives of the isomorphism classes for fields of…

Rings and Algebras · Mathematics 2026-03-09 U. Bekbaev , I. Rakhimov

This article reports on an approach to point counting on algebraic varieties over finite fields that is based on a detailed investigation of the $2$-adic orthogonal group. Combining the new approach with a $p$-adic method, we count the…

Number Theory · Mathematics 2022-07-01 Andreas-Stephan Elsenhans , Jörg Jahnel

We define nodal finite dimensional algebras and describe their structure over an algebraically closed field. For a special class of such algebras (type A) we find a criterion of tameness.

Representation Theory · Mathematics 2015-01-27 Yuriy A. Drozd , Vasyl V. Zembyk

We classify, up to isomorphism and up to equivalence, division gradings (by abelian groups) on finite-dimensional simple real algebras. Gradings on finite-dimensional simple algebras are determined by division gradings, so our results give…

Rings and Algebras · Mathematics 2015-12-23 Adrián Rodrigo-Escudero

A complete classification of two-dimensional algebras over algebraically closed fields is provided

Rings and Algebras · Mathematics 2018-12-04 H. Ahmed , U. Bekbaev , I. Rakhimov
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