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In this paper we provide an algorithm to classify groups of points on abelian threefolds over finite fields. The classification is given in terms of the Weil polynomial of abelian varieties in a given $\mathbb{F}_q$-isogeny class. This work…

Number Theory · Mathematics 2019-05-20 Yulia Kotelnikova

We show that elementary abelian direct factors can be disregarded in the study of the modular isomorphism problem. Moreover, we obtain four new series of abelian invariants of the group base in the modular group algebra of a finite…

Rings and Algebras · Mathematics 2023-09-25 Leo Margolis , Taro Sakurai , Mima Stanojkovski

In this article, we study the Calabi invariant on the unit disk usually defined on compactly supported Hamiltonian diffeomorphisms of the open disk. In particular we extend the Calabi invariant to the group of $C^1$ diffeomorphisms of the…

Symplectic Geometry · Mathematics 2021-02-19 Benoît Joly

This contribution presents a comprehensive analysis of Colombeau (-type) algebras in the range between the diffeomorphism invariant algebra introduced in Part I and Colombeau's original algebra. Along the way, it provides several…

Functional Analysis · Mathematics 2007-05-23 Michael Grosser

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

We classify the category of finite-dimensional real division composition algebras having a non-abelian Lie algebra of derivations. Our complete and explicit classification is largely achieved by introducing the concept of a…

Rings and Algebras · Mathematics 2015-09-18 Seidon Alsaody

This thesis addresses questions in representation and invariant theory of finite groups. The first concerns singularities of quotient spaces under actions of finite groups. We introduce a class of finite groups such that the quotients have…

Commutative Algebra · Mathematics 2018-03-26 Ben Blum-Smith

Coclass theory has been a highly successful approach towards the investigation and classification of finite nilpotent groups. Here we suggest a similar approach for finite nilpotent semigroups. This differs from the group theory setting in…

Rings and Algebras · Mathematics 2014-04-17 Andreas Distler , Bettina Eick

Let $X=GD$ be a group, where $G$ is a nonabelian simple group and $D$ is a dihedral group. These groups $X$ are closely related to regular Cayley maps. The main theorems of this paper describes $X$.

Combinatorics · Mathematics 2026-05-06 Hao Yu

We provide a complete classification of the singularities of cluster algebras of finite type with trivial coefficients. Alongside, we develop a constructive desingularization of these singularities via blowups in regular centers over fields…

Algebraic Geometry · Mathematics 2022-06-01 Angelica Benito , Eleonore Faber , Hussein Mourtada , Bernd Schober

We classify Galois objects for the dual of a group algebra of a finite group over an arbitrary field.

Quantum Algebra · Mathematics 2010-06-22 Cesar Galindo , Manuel Medina

We study linearizability of actions of finite groups on cubic threefolds with nonnodal isolated singularities.

Algebraic Geometry · Mathematics 2025-11-14 Ivan Cheltsov , Lisa Marquand , Yuri Tschinkel , Zhijia Zhang

We prove by using simple number-theoretic arguments formulae concerning the number of elements of a fixed order and the number of cyclic subgroups of a direct product of several finite cyclic groups. We point out that certain multiplicative…

Group Theory · Mathematics 2012-11-08 László Tóth

We provide an example of a non-finitely generated group which admits a nonempty strongly aperiodic SFT. Furthermore, we completely characterize the groups with this property in terms of their finitely generated subgroups and the roots of…

Dynamical Systems · Mathematics 2023-07-21 Sebastián Barbieri

We comment on the paper "Extremal Cayley digraphs of finite Abelian groups" [Intercon. Networks 12 (2011), no. 1-2, 125--135]. In particular, we give some counterexamples to the results presented there, and provide a correct result for…

Combinatorics · Mathematics 2014-10-28 M. A. Fiol

We enhance the biquandle counting invariant using elements of truncated biquandle-labeled Polyak algebras. These finite type enhancements reduce to the finite type enhancements defined by Goussarov, Polyak and Viro for the trivial biquandle…

Geometric Topology · Mathematics 2015-06-03 Sam Nelson

We associate each endomorphism of a finite cyclic group with a digraph and study many properties of this digraph, including its adjacent matrix and automorphism group.

Combinatorics · Mathematics 2011-08-16 Min Sha

In this paper, we completely classify the finite $p$-groups $G$ such that $\Phi(G')G_3\le C_p^2$, $\Phi(G')G_3\le Z(G)$ and $G/\Phi(G')G_3$ is minimal non-abelian. This paper is a part of the classification of finite $p$-groups with a…

Group Theory · Mathematics 2023-07-19 Lijian An , Ruifang Hu , Qinhai Zhang

We consider two variants of those Abelian groups with all proper strongly invariant subgroups isomorphic and give an in-depth study of their basic and specific properties in either parallel or contrast to the Abelian groups with all proper…

Group Theory · Mathematics 2023-08-01 Andrey R. Chekhlov , Peter V. Danchev

We study abelian varieties and K3 surfaces with complex multiplication defined over number fields of fixed degree. We show that these varieties fall into finitely many isomorphism classes over an algebraic closure of the field of rational…

Algebraic Geometry · Mathematics 2019-02-20 Martin Orr , Alexei N. Skorobogatov