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This paper is the first part of a study devoted to description of modular elements in the lattices of semigroup and epigroup varieties. We provide strengthened necessary and sufficient conditions under which a semigroup or epigroup variety…

Group Theory · Mathematics 2025-11-25 Vyacheslav Yu. Shaprynski\vı , Dmitry V. Skokov

We define and study a transform whose iterates bring to the fore interesting relations between Pisot numbers and primes. Although the relations we describe are general, they take a particular form in the Pisot limit points. We give three…

Number Theory · Mathematics 2012-05-08 Andrei Vieru

We give a thorough structural analysis of the principal one-sided ideals of arbitrary semigroups, and then apply this to full transformation semigroups and symmetric inverse monoids. One-sided ideals of these semigroups naturally occur as…

Group Theory · Mathematics 2019-11-19 James East

We characterize numerical semigroups for which the poset of its ideal class monoid is a lattice, and study the irreducible elements of such a lattice with respect to union, intersection, infimum and supremum.

Commutative Algebra · Mathematics 2024-12-11 S. Bonzio , P. A. García-Sánchez

Ideals are one of the main topics of interest to the study of the order structure of an algebra. Due to their nice properties, ideals have an important role both in lattice theory and semigroup theory. Two natural concepts of ideal can be…

Rings and Algebras · Mathematics 2013-02-25 Joao Pita Costa

Motivated by deformation quantization, we introduced in an earlier work the notion of formal Morita equivalence in the category of $^*$-algebras over a ring $\ring C$ which is the quadratic extension by $\im$ of an ordered ring $\ring R$.…

Quantum Algebra · Mathematics 2007-05-23 Henrique Bursztyn , Stefan Waldmann

We study rings of real-valued continuous functions in terms of pseudocomplementation conditions on various lattices attached to their prime spectrum. We fully characterize pseudocomplementation in all cases and have an almost complete…

General Topology · Mathematics 2026-03-31 Guram Bezhanishvili , Marcus Tressl

Let $\Delta =\left(\begin{smallmatrix} A & {_AN_B}\\ {_BM_A} & B \\\end{smallmatrix}\right)$ be a Morita ring with $M\otimes_{A}N=0=N\otimes_{B}M$.We first study how to construct (complete) duality pairs of $\Delta$-modules using (complete)…

Rings and Algebras · Mathematics 2023-05-02 Yajun Ma , Jiafeng Lü , Huanhuan Li , Jiangsheng Hu

The main purpose of this paper is to study and investigate concerning a ({\alpha},{\alpha})-symmetric derivations D on semiprime rings and prime rings R, we give some results when R admits a ({\alpha},{\alpha})-symmetric derivations D to…

Rings and Algebras · Mathematics 2017-11-16 Mehsin Jabel Atteya , Dalal Ibraheem Rasen

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

We study ideal-theoretic conditions for a monomial ideal to be Golod. For ideals in a polynomial ring in three variables, our criteria give a complete characterization. Over such rings, we show that the product of two monomial ideals is…

Commutative Algebra · Mathematics 2019-02-12 Hailong Dao , Alessandro De Stefani

This paper is concerned with the prime spectrum of a tensor product of algebras over a field. It seeks necessary and sufficient conditions for such a tensor product to have the S-property, strong S-property, and catenarity. Its main results…

Commutative Algebra · Mathematics 2007-05-23 S. Bouchiba , D. E. Dobbs , S. Kabbaj

In this paper, we investigate primeness of groupoid graded rings. We provide a set of necessary and sufficient conditions for primeness of a nearly-epsilon strongly groupoid graded ring. Furthermore, we apply our main result to get a…

Rings and Algebras · Mathematics 2022-12-22 Paula S. E. Moreira , Johan Öinert

We study what we call quasi-spline sheaves over locally Noetherian schemes. This is done with the intention of considering splines from the point of view of moduli theory. In other words, we study the way in which certain objects that arise…

Algebraic Geometry · Mathematics 2016-12-05 Patrick Clarke

Let $R$ be a Noetherian ring and let $C$ be a semidualizing $R$-module. In this paper, by using the classes $ \mathcal{P}_C $ and $ \mathcal{I}_C $, we extend the notions of perfect and coperfect modules introduced by D.Rees \cite{R} and…

Commutative Algebra · Mathematics 2016-04-08 M. Rahmani , A. -J. Taherizadeh

We study the conditions under which a TTF class in a module category over a ring is silting. Using the correspondence between idempotent ideals over a ring and TTF classes in the module category, we focus on finding the necessary and…

Rings and Algebras · Mathematics 2024-11-27 Alejandro Argudin-Monroy , Daniel Bravo , Carlos E. Parra

We give a comprehensive study of the so-called \textit{semi-tripotent rings} obtaining their new and non-trivial characterization as well as a complete description in terms of sums and products of some special elements. Particularly, we…

Rings and Algebras · Mathematics 2025-05-27 Ahmad Moussavi , Peter Danchev , Arash Javan , Omid Hasanzadeh

We say that a subring $R_0$ of a ring $R$ is semi-invariant if $R_0$ is the ring of invariants in $R$ under some set of ring endomorphisms of some ring containing $R$. We show that $R_0$ is semi-invariant if and only if there is a ring…

Rings and Algebras · Mathematics 2015-04-07 Uriya A. First

It is known that the polyomino ideal of simple polyominoes is prime. In this paper, we focus on multiply connected polyominoes, namely polyominoes with holes, and observe that the non-existence of a certain sequence of inner intervals of…

Commutative Algebra · Mathematics 2020-10-21 Carla Mascia , Giancarlo Rinaldo , Francesco Romeo

This paper is a sequel to a paper by the same authors, where they defined $K$-groups of model-theoretic structures, and computed $K_1$ of free modules over PIDs. In this paper, we compute $K_1$ of a right $M_q(R)$-module $M$, where $R$ is a…

Logic · Mathematics 2025-11-10 Sourayan Banerjee , Amit Kuber
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