scholarly journals CANONICAL AND -CANONICAL MODULES OF A NOETHERIAN ALGEBRA

2016 ◽  
Vol 226 ◽  
pp. 165-203
Author(s):  
MITSUYASU HASHIMOTO
Keyword(s):  
Commutative Ring ◽  
Finite Algebra ◽  
Canonical Module ◽  
Basic Properties ◽  
Noncommutative Version ◽  
Local Homomorphism ◽  
Noetherian Algebra

We define canonical and $n$-canonical modules of a module-finite algebra over a Noether commutative ring and study their basic properties. Using $n$-canonical modules, we generalize a theorem on $(n,C)$-syzygy by Araya and Iima which generalize a well-known theorem on syzygies by Evans and Griffith. Among others, we prove a noncommutative version of Aoyama’s theorem which states that a canonical module descends with respect to a flat local homomorphism.

scholarly journals On Almost Semiprime Submodules

Algebra ◽  
2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Farkhonde Farzalipour
Keyword(s):  
Commutative Ring ◽  
Finitely Generated ◽  
Basic Properties ◽  
Nonzero Identity

We introduce the concept of almost semiprime submodules of unitary modules over a commutative ring with nonzero identity. We investigate some basic properties of almost semiprime and weakly semiprime submodules and give some characterizations of them, especially for (finitely generated faithful) multiplication modules.

Comaximal factorization of lifting ideals

2020 ◽  
pp. 2250044
Author(s):  
Esmaeil Rostami ◽  
Sina Hedayat ◽  
Reza Nekooei ◽  
Somayeh Karimzadeh
Keyword(s):  
Commutative Ring ◽  
Proper Ideal ◽  
Sufficient Condition ◽  
Necessary And Sufficient Condition ◽  
New Approach ◽  
Ideal Formula ◽  
Basic Properties ◽  
Necessary And Sufficient

A proper ideal [Formula: see text] of a commutative ring [Formula: see text] is called lifting whenever idempotents of [Formula: see text] lift to idempotents of [Formula: see text]. In this paper, many of the basic properties of lifting ideals are studied and we prove and extend some well-known results concerning lifting ideals and lifting idempotents by a new approach. Furthermore, we give a necessary and sufficient condition for every proper ideal of a commutative ring to be a product of pairwise comaximal lifting ideals.

CAYLEY SUM GRAPHS OF IDEALS OF A COMMUTATIVE RING

2014 ◽  
Vol 96 (3) ◽  
pp. 289-302 ◽  
Author(s):  
M. AFKHAMI ◽  
Z. BARATI ◽  
K. KHASHYARMANESH ◽  
N. PAKNEJAD
Keyword(s):  
Commutative Ring ◽  
Directed Graph ◽  
Undirected Graph ◽  
Clique Number ◽  
Basic Properties ◽  
Vertex Set ◽  
Ring Graph ◽  
Genus One ◽  
Cayley Sum Graph

AbstractLet $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}R$ be a commutative ring, $I(R)$ be the set of all ideals of $R$ and $S$ be a subset of $I^*(R)=I(R)\setminus \{0\}$. We define a Cayley sum digraph of ideals of $R$, denoted by $\overrightarrow{\mathrm{Cay}}^+ (I(R),S)$, as a directed graph whose vertex set is the set $I(R)$ and, for every two distinct vertices $I$ and $J$, there is an arc from $I$ to $J$, denoted by $I\longrightarrow J$, whenever $I+K=J$, for some ideal $K $ in $S$. Also, the Cayley sum graph $ \mathrm{Cay}^+ (I(R), S)$ is an undirected graph whose vertex set is the set $I(R)$ and two distinct vertices $I$ and $J$ are adjacent whenever $I+K=J$ or $J+K=I$, for some ideal $K $ in $ S$. In this paper, we study some basic properties of the graphs $\overrightarrow{\mathrm{Cay}}^+ (I(R),S)$ and $ \mathrm{Cay}^+ (I(R), S)$ such as connectivity, girth and clique number. Moreover, we investigate the planarity, outerplanarity and ring graph of $ \mathrm{Cay}^+ (I(R), S)$ and also we provide some characterization for rings $R$ whose Cayley sum graphs have genus one.

scholarly journals Approximaitly Prime Submodules and Some Related Concepts

2019 ◽  
Vol 32 (2) ◽  
pp. 103
Author(s):  
Ali Sh. Ajeel ◽  
Haibat K. Mohammad Ali
Keyword(s):  
Prime Ideal ◽  
Commutative Ring ◽  
Research Note ◽  
Prime Radical ◽  
Basic Properties ◽  
Prime Submodules ◽  
Prime Submodule ◽  
Definition Of

In this research note approximately prime submodules is defined as a new generalization of prime submodules of unitary modules over a commutative ring with identity. A proper submodule  of an -module  is called an approximaitly prime submodule of  (for short app-prime submodule), if when ever , where , , implies that either  or . So, an ideal  of a ring  is called app-prime ideal of  if   is an app-prime submodule of -module . Several basic properties, characterizations and examples of approximaitly prime submodules were given. Furthermore, the definition of approximaitly prime radical of submodules of modules were introduced, and some of it is properties were established.

scholarly journals W-Closed Submodule and Related Concepts

2018 ◽  
Vol 31 (2) ◽  
pp. 164
Author(s):  
Haibat K. Mohammad Ali ◽  
Mohammad E. Dahsh
Keyword(s):  
Commutative Ring ◽  
Chain Condition ◽  
Essential Extension ◽  
Basic Properties ◽  
Closed Submodule ◽  
Closed Submodules

    Let R be a commutative ring with identity, and M be a left untial module. In this paper we introduce and study the concept w-closed submodules, that is stronger form of the concept of closed submodules, where asubmodule K of a module M is called w-closed in M, "if it has no proper weak essential extension in M", that is if there exists a submodule L of M with K is weak essential submodule of L then K=L. Some basic properties, examples of w-closed submodules are investigated, and some relationships between w-closed submodules and other related modules are studied. Furthermore, modules with chain condition on w-closed submodules are studied.   

A Note on Semihereditary Rings

1973 ◽  
Vol 16 (3) ◽  
pp. 439-440
Author(s):  
E. Enochs
Keyword(s):  
Commutative Ring ◽  
Noncommutative Version ◽  
Semihereditary Rings

It's well known (see Endo [1]) that for a commutative ring A, if A is semihereditary then w.gl. dim. A ≤ 1. It seems worth recording the noncommutative version of this.

scholarly journals Graded near-rings

2016 ◽  
Vol 24 (1) ◽  
pp. 201-216
Author(s):  
Mariana Dumitru ◽  
Laura Năstăsescu ◽  
Bogdan Toader
Keyword(s):  
Commutative Ring ◽  
Constant Term ◽  
Graded Rings ◽  
Graded Ring ◽  
Basic Properties ◽  
Cancellative Monoid ◽  
Ring Of Polynomials ◽  
Left Cancellative Monoid

AbstractIn this paper, we consider graded near-rings over a monoid G as generalizations of graded rings over groups, and study some of their basic properties. We give some examples of graded near-rings having various interesting properties, and we define and study the Gop-graded ring associated to a G-graded abelian near-ring, where G is a left cancellative monoid and Gop is its opposite monoid. We also compute the graded ring associated to the graded near-ring of polynomials (over a commutative ring R) whose constant term is zero.

scholarly journals Approximaitly Primary Submodules

2019 ◽  
Vol 24 (5) ◽  
pp. 105
Author(s):  
Ali Sh. Ajeel ◽  
Haibat K. Mohammadali
Keyword(s):  
Positive Integer ◽  
Commutative Ring ◽  
The Other ◽  
Left Module ◽  
Basic Properties ◽  
Other Hand ◽  
Prime Submodules ◽  
Primary Submodules ◽  
Primary Submodule

The study deals with the notion of an approximaitly primary submodules of unitary left -module  over a commutative ring  with identity as a generalization of a primary submodules and approximaitly prime submodules, where a proper submodule  of an -module  is called an approximaitly primary submodule of , if whenever , for , , implies that either  or  for some positive integer  of . Several characterizations, basic properties of this concept are given. On the other hand the relationships of this concept with some classes of modules are studied. Furthermore, the behavior of approximaitly primary submodule under -homomorphism are discussed   http://dx.doi.org/10.25130/tjps.24.2019.098

scholarly journals Quasi J-Regular Modules

2020 ◽  
pp. 1473-1478
Author(s):  
Rafid M. AL – Shaiban ◽  
Nuhad S. AL-Mothafar
Keyword(s):  
Commutative Ring ◽  
Basic Properties

Throughout this note, R is commutative ring with identity and M is a unitary R-module. In this paper, we introduce the concept of quasi J-  submodules as a     –  and give some of its basic properties. Using this concept, we define the class of quasi J-regular modules, where an R-module     J- module if every submodule of  is quasi J-pure. Many results about this concept

scholarly journals On 1-absorbing δ-primary ideals

2021 ◽  
Vol 29 (3) ◽  
pp. 135-150
Author(s):  
Abdelhaq El Khalfi ◽  
Najib Mahdou ◽  
Ünsal Tekir ◽  
Suat Koç
Keyword(s):  
Commutative Ring ◽  
Direct Product ◽  
Proper Ideal ◽  
Primary Ideal ◽  
Basic Properties ◽  
New Class ◽  
Ring Extensions ◽  
Primary Ideals ◽  
Nonzero Identity

Abstract Let R be a commutative ring with nonzero identity. Let 𝒥(R) be the set of all ideals of R and let δ : 𝒥 (R) → 𝒥 (R) be a function. Then δ is called an expansion function of ideals of R if whenever L, I, J are ideals of R with J ⊆ I, we have L ⊆ δ (L) and δ (J) ⊆ δ (I). Let δ be an expansion function of ideals of R. In this paper, we introduce and investigate a new class of ideals that is closely related to the class of δ -primary ideals. A proper ideal I of R is said to be a 1-absorbing δ -primary ideal if whenever nonunit elements a, b, c ∈ R and abc ∈ I, then ab ∈ I or c ∈ δ (I). Moreover, we give some basic properties of this class of ideals and we study the 1-absorbing δ-primary ideals of the localization of rings, the direct product of rings and the trivial ring extensions.

Sign in / Sign up

Export Citation Format

Share Document