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A complete classification of finitely generated involutive commutative two-valued groups is obtained. Three series of such two-valued groups are constructed: principal, unipotent and special, and it is shown that any finitely generated…

Group Theory · Mathematics 2023-02-14 Victor M. Buchstaber , Alexander A. Gaifullin , Alexander P. Veselov

This is a report on our long term project to find an algorithm to decide if a finitely presented group has a non-trivial action on a tree.

Geometric Topology · Mathematics 2022-03-07 A. N. Bartholomew , M. J. Dunwoody

In this note, we investigate how different fundamental groups of presentations of a fixed algebra $A$ can be. For finitely many finitely presented groups $G_i$, we construct an algebra $A$ such that all $G_i$ appear as fundamental groups of…

Rings and Algebras · Mathematics 2007-05-23 Juan Carlos Bustamante , Diane Castonguay

In the first part of this note, we introduce Tietze transformations for $L$-presentations. These transformations enable us to generalize Tietze's theorem for finitely presented groups to invariantly finitely $L$-presented groups. Moreover,…

Group Theory · Mathematics 2012-05-02 René Hartung

For a commutative finite $\mathbb{Z}$-algebra, i.e., for a commutative ring $R$ whose additive group is finitely generated, it is known that the group of units of $R$ is finitely generated, as well. Our main results are algorithms to…

Commutative Algebra · Mathematics 2025-06-18 Martin Kreuzer , Florian Walsh

We present a uniform methodology for computing with finitely generated matrix groups over any infinite field. As one application, we completely solve the problem of deciding finiteness in this class of groups. We also present an algorithm…

Group Theory · Mathematics 2019-05-14 A. S. Detinko , D. L. Flannery , E. A. O'Brien

In this article we introduce and study a class of finite groups for which the orders of normal subgroups satisfy a certain inequality. It is closely connected to some well-known arithmetic classes of natural numbers.

Group Theory · Mathematics 2018-05-31 Marius Tărnăuceanu

We characterize finite groups G generated by orthogonal transformations in a finite-dimensional Euclidean space V whose fixed point subspace has codimension one or two in terms of the corresponding quotient space V/G with its quotient…

Geometric Topology · Mathematics 2017-11-02 Christian Lange

We prove that the genus of a finite-dimensional division algebra is finite whenever the center is a finitely generated field of any characteristic. We also discuss potential applications of our method to other problems, including the…

Rings and Algebras · Mathematics 2019-02-05 Vladimir I. Chernousov , Andrei S. Rapinchuk , Igor A. Rapinchuk

We give a description of a finite group whose maximal subgroups possess only soluble proper subgroups, which implies the answer to the well-known question on composition factors of finite groups, whose second maximal subgroups are soluble.

Group Theory · Mathematics 2021-12-20 Daria Lytkina , Archil Zhurtov

Finite (or Discrete) Fourier Transforms (FFT) are essential tools in engineering disciplines based on signal transmission, which is the case in most of them. FFT are related with circulant matrices, which can be viewed as group matrices of…

Number Theory · Mathematics 2013-01-08 Kanemitsu Shigeru , Waldschmidt Michel

This is a survey article on some recent developments in the arithmetic theory of linear algebraic groups over higher-dimensional fields, written for the Notices of the AMS.

Number Theory · Mathematics 2021-01-26 Andrei S. Rapinchuk , Igor A. Rapinchuk

In this paper we study the possibility to define irreducible representations of the symmetric groups with the help of finitely many relations. The existence of finite bases is established for the classes of representations corresponding to…

Representation Theory · Mathematics 2007-05-23 Vladimir Shchigolev

We present two uncountable families of finitely generated residually finite groups all having the same profinite completion. One consists of soluble groups, the other of branch groups.

Group Theory · Mathematics 2021-07-30 Nikolay Nikolov , Dan Segal

It is shown that there exist finitely generated infinite simple groups of infinite commutator width and infinite square width on which there exists no stably unbounded conjugation-invariant norm, and in particular stable commutator length…

Group Theory · Mathematics 2010-09-08 Alexey Muranov

We consider groups of finite Morley rank with solvable local subgroups of even and mixed types. We also consider miscellaneous aspects of small groups of finite Morley rank of odd type.

Group Theory · Mathematics 2008-09-15 Adrien Deloro , Eric Jaligot

This note collects several results on the capability of $p$-groups of class two and prime exponent. Among the new results, we settle the 4-generator case for this class.

Group Theory · Mathematics 2007-05-23 Arturo Magidin

This article focuses on the study of cut groups, i.e., the groups which have only trivial central units in their integral group ring. We provide state of art for cut groups. The results are compiled in a systematic manner and have also been…

Rings and Algebras · Mathematics 2025-05-15 Seema Chahal , Sugandha Maheshwary

We report on recent progress concerning the relationship that exists between the algebraic structure of a finite group and certain features of its class-size prime graph.

Group Theory · Mathematics 2024-10-02 Víctor Sotomayor

We start with definitions of the general notions of the theory of $\Bbb Z_{2}$-graded algebras. Then we consider theory of inductive families of $\Bbb Z_{2}$-graded semisimple finite-dimensional algebras and its representations in the…

Representation Theory · Mathematics 2008-01-17 A. M. Vershik , A. N. Sergeev