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We investigate whether the group algebra of a finite group over a localisation of the integers is semiperfect. The main result is a necessary and sufficient arithmetic criterion in the ordinary case. In the modular case, we propose a…

Rings and Algebras · Mathematics 2025-10-10 Dylan Johnston , Dmitriy Rumynin

Let $R$ be a commutative ring with non-zero identity and $M$ be a unitary $R$-module. The goal of this paper is to extend the concept of 1-absorbing primary ideals to 1-absorbing primary submodules. A proper submodule $N$ of $M$ is said to…

Commutative Algebra · Mathematics 2021-02-25 Ece Yetkin Celikel

Let $A$ be a commutative ring with identity. A proper submodule $N$ of $A$-module $M$ is said to be prime submodule if $ax \in N$ where $a \in A, x \in M$, implies $x \in N$ or $aM \subseteq N$. A proper submodule $N \subset M$ is said to…

Commutative Algebra · Mathematics 2025-04-03 Gürsel Yeşilot , Esra Tarakcı , Yasemin Şimşek

Let $R$ be a commutative unital ring and $N$ be a submodule of an $R$-module $M$. The submodule $\langle E_M(N)\rangle$ generated by the envelope $E_M(N)$ of $N$ is instrumental in studying rings and modules that satisfy the radical…

Rings and Algebras · Mathematics 2025-06-26 David Ssevviiri , Annet Kyomuhangi

In 2005, M. Behboodi introduced the notion of a classical prime ring module, which he showed is, in general, nonequivalent to a (Dauns) prime ring module. In this paper, we extended the idea of classical primeness to near-ring module.…

Rings and Algebras · Mathematics 2024-07-24 P. Djagba , S. Juglal

In this study, we aim to introduce the concept of classical 1-absorbing prime submodules of a nonzero unital module $M$ over a commutative ring $A$ with unity. A proper submodule $P$ of $M$ is said to be a classical 1-absorbing prime…

Rings and Algebras · Mathematics 2024-05-13 Zeynep Yılmaz Uçar , Bayram Ali Ersoy , Ünsal Tekir , Suat Koç , Serkan Onar

We first introduce and study the notion of semi-regular flat modules, and then show that a ring $R$ is a strong \Prufer\ ring if and only if every submodule of a semi-regular flat $R$-module is semi-regular flat, if and only if every ideal…

Commutative Algebra · Mathematics 2021-11-04 Xiaolei Zhang , Guocheng Dai , Xuelian Xiao , Wei Qi

A module $M$ is called an automorphism-invariant module if every isomorphism between two essential submodules of $M$ extends to an automorphism of $M$. This paper introduces the notion of dual of such modules. We call a module $M$ to be a…

Rings and Algebras · Mathematics 2012-08-27 S. Singh , Ashish K. Srivastava

Principal affine open subsets in affine schemes are an important tool in the foundations of algebraic geometry. Given a commutative ring $R$, $\,R$-modules built from the rings of functions on principal affine open subschemes in…

Commutative Algebra · Mathematics 2020-05-27 Leonid Positselski , Alexander Slavik

In an earlier publication, the last two authors showed that a finite-dimensional module for a quantum affine algebra of type $A$ whose $q$-factorization graph is totally ordered is prime. In this paper, we continue the investigation of the…

Representation Theory · Mathematics 2025-11-20 Matheus Brito , Adriano Moura , Clayton Silva

Tensor products usually have nonzero torsion. This is a central theme of Auslander's paper "Modules over unramified regular local rings"; the theme continues in the work of Huneke and Wiegand. The main focus in this note is on tensor powers…

Commutative Algebra · Mathematics 2014-12-22 Olgur Celikbas , Srikanth B. Iyengar , Greg Piepmeyer , Roger Wiegand

Let $R$ be a commutative ring with identity and $M$ be a unitary $R$-module. The aim of this paper is to extend the notion of quasi $J$-ideals of commutative rings to quasi $J$-submodules of modules. We call a proper submodule $N$ of $M$ a…

Commutative Algebra · Mathematics 2021-02-23 Ece Yetkin Celikel , Hani A. Khashan

We introduce a similarity relation between submodules of a module $M$ over a ring $R$, extending the classical notion of similarity for right ideals. Focusing on (faithfully) projective modules, we establish a sharp lower bound for the…

Rings and Algebras · Mathematics 2026-04-07 Alborz Azarang

We study prime ideals, prime modules, and associated primes of graded modules over rings $S$ graded by a unique product monoid. We consider two situations in detail: (a) the case where $S$ is strongly group-graded and (b) the case where $S$…

Rings and Algebras · Mathematics 2017-11-29 Allen D. Bell

Starting from the notion of totally reflexive modules, we survey the theory of Gorenstein homological dimensions for modules over commutative rings. The account includes the theory's connections with relative homological algebra and with…

Commutative Algebra · Mathematics 2010-01-03 Lars Winther Christensen , Hans-Bjørn Foxby , Henrik Holm

This work introduces the first in-depth study of h-free and h-full elements in abelian monoids, providing a unified approach for understanding their role in various mathematical structures. Let m be an element of an abelian monoid, with…

Number Theory · Mathematics 2025-06-03 Sourabhashis Das , Wentang Kuo , Yu-Ru Liu

In our recent work, we introduced a generalization of the prime ideal factorization in Dedekind domains for submodules of finitely generated modules over Noetherian rings. In this article, we find conditions for the intersection of two…

Commutative Algebra · Mathematics 2026-01-06 K. R. Thulasi , T. Duraivel , S. Mangayarcarassy

Let R be a commutative ring, M an R-module. In this paper, we will introduce the concept of n-pure submodules of M as a generalization of pure submodules and obtain some related results.

Commutative Algebra · Mathematics 2020-02-05 F Farshadifar

In 1859, Ernst E. Kummer \cite{erns} introduced the concept prime ideal and after that in 1983 this concept was generalized to prime submodules by R. McCasland \cite{mcca}. In this article, by considering complexes as a generalization of…

Commutative Algebra · Mathematics 2023-04-04 Ismael Akray

In this note we describe conditions under which, in idempotent functional analysis, linear operators have integral representations in terms of idempotent integral of V. P. Maslov. We define the notion of nuclear idempotent semimodule and…

Functional Analysis · Mathematics 2007-05-23 Grigori Litvinov , Grigori Shpiz