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In this paper, new algebraic and topological results on purely-prime ideals of a commutative ring (pure spectrum) are obtained. Especially, Grothendieck type theorem is obtained which states that there is a canonical correspondence between…

Commutative Algebra · Mathematics 2020-06-30 Abolfazl Tarizadeh , Mohsen Aghajani

For an action of a finite group on a C*-algebra, we present some conditions under which properties of the C*-algebra pass to the crossed product or the fixed point algebra. We mostly consider the ideal property, the projection property,…

Operator Algebras · Mathematics 2012-08-21 Cornel Pasnicu , N. Christopher Phillips

The aim of this note is to understand under which conditions invertible modules over a commutative S-algebra in the sense of Elmendorf, Kriz, Mandell and May give rise to elements in the algebraic Picard group of invertible graded modules…

Algebraic Topology · Mathematics 2007-05-23 Andrew Baker , Birgit Richter

In this paper, we study the strong Lefschetz property of artinian complete intersection ideals generated by products of linear forms. We prove the strong Lefschetz property for a class of such ideals with binomial generators.

Commutative Algebra · Mathematics 2017-08-08 Martina Juhnke-Kubitzke , Rosa M. Miró-Roig , Satoshi Murai , Akihito Wachi

We give a positive answer to the Huneke-Wiegand Conjecture for monomial ideals over free numerical semigroup rings, and for two generated monomial ideals over complete intersection numerical semigroup rings.

Commutative Algebra · Mathematics 2012-11-20 Pedro A. Garcia-Sanchez , Micah J. Leamer

In the theory of commutative semirings, the lack of additive inverses creates a structural divergence between ideals and congruences that does not exist in ring theory. The aim of this article is to restore critical ideal-theoretic…

Rings and Algebras · Mathematics 2026-01-06 Pubali Sengupta , Amartya Goswami , Pronay Biswas , Sujit Kumar Sardar

We present a number of findings concerning groupoid dynamical systems and groupoid crossed products. The primary result is an identification of the spectrum of the groupoid crossed product when the groupoid has continuously varying abelian…

Operator Algebras · Mathematics 2009-05-29 Geoff Goehle

It is shown that in a Cohen-Macaulay local ring, the generic linkage of an ideal $I$ is a deformation of the arbitrary linkage of $I$. This fact does not need $I$ to be a Cohen-Macaulay ideal. The same holds for $s$-residual intersections…

Commutative Algebra · Mathematics 2026-04-23 Hamid Hassanzadeh , Kevin Vasconcellos

Using the recent results on square-free Gr\"obner degenerations by Conca and Varbaro, we proved that if a homogeneous ideal $I$ of a polynomial ring is such that its initial ideal $\mathrm{in}_<(I)$ is square-free and $\beta_0(I) =…

Commutative Algebra · Mathematics 2023-03-31 Hongmiao Yu

Let R be a commutative ring with identity and I be an ideal of R. The cozero-divisor graph with respect to I, denoted by $\Gamma''_I(R)$, is the graph of R with vertices {x \in R -I :xR +I \not=R} and two distinct vertices $x$ and $y$ are…

Commutative Algebra · Mathematics 2025-10-24 F. Farshadifar

The aim of this paper is to study some distinguished classes of $k$-ideals of semirings, which include $k$-prime, $k$-semiprime, $k$-radical, $k$-irreducible, and $k$-strongly irreducible ideals. We discuss some of the properties of…

Rings and Algebras · Mathematics 2023-04-11 Themba Dube , Amartya Goswami

Let $R$ be a ring with unity. The graph $\Gamma(R)$ is a graph with vertices as elements of $R$, where two distinct vertices $a$ and $b$ are adjacent if and only if $Ra+Rb=R$. Let $\Gamma_2(R)$ is the subgraph of $\Gamma(R)$ induced by the…

Rings and Algebras · Mathematics 2010-07-21 S. Akbari , M. Habibi , A. Majidinya , R. Manaviyat

In commutative ring theory, there is a theorem of Cohen which states that if in a commutative ring all prime ideals are finitely generated then every ideal is finitely generated. However, it is known that having only maximal ideals finitely…

Commutative Algebra · Mathematics 2018-07-10 Souvik Dey

Let $E$ be an arbitrary (countable) graph and let $R$ be a unital commutative ring. We analyze the ideal structure of the Leavitt path algebra $\lr$ introduced by Mark Tomforde. We first modify the definition of basic ideals and we then…

Rings and Algebras · Mathematics 2012-10-30 Hossein Larki

This paper is a continuation of a previous work by the author and G. Puninski where iterated intersections of powers of ideals were studied in rings of iterated differential polynomials. We present a method which can be used to show that…

Rings and Algebras · Mathematics 2024-01-15 Pavel Příhoda

Semiprime ideals of an arbitrary Leavitt path algebra L are described in terms of their generators. This description is then used to show that the semiprime ideals form a complete sublattice of the lattice of ideals of L, and they enjoy a…

Rings and Algebras · Mathematics 2019-04-01 Gene Abrams , Be'eri Greenfeld , Zachary Mesyan , Kulumani M. Rangaswamy

We give an elementary proof prove of the preservation of the Noetherian condition for commutative rings with unity $R$ having at least one finitely generated ideal $I$ such that the quotient ring is again finitely generated, and $R$ is…

Commutative Algebra · Mathematics 2017-09-11 Danny A. J. Gomez-Ramirez , Juan D. Velez , Edisson Gallego

One describes generators of disguised residual intersections in any commutative Noetherian rings. It is shown that, over Cohen-Macaulay rings, the disguised residual intersections and algebraic residual intersections are the same, for…

Commutative Algebra · Mathematics 2019-09-25 Vinicius Bouça , Seyed Hamid Hassanzadeh

We continue the study of intersection algebras $\mathcal B = \mathcal B_R(I, J)$ of two ideals $I, J$ in a commutative Noetherian ring $R$. In particular, we exploit the semigroup ring and toric structures in order to calculate various…

Commutative Algebra · Mathematics 2018-10-04 Florian Enescu , Sandra Spiroff

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