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In this paper, we are motivated by two conjectures proposed by C. Bender et al.\ in 2024, which have remained open questions. The first conjecture states that if the complemented zero-divisor graph \( G(S) \) of a commutative semigroup \( S…

Combinatorics · Mathematics 2025-06-23 Anagha Khiste , Ganesh Tarte , Vinayak Joshi

Let $f : A \rightarrow B$ be a ring homomorphism and $J$ be an ideal of $B$. In this paper, we give a characterization of zero divisors of the amalgamation which is a generalization of Maimani's and Yassemi's work (see \cite{y}). Also, we…

Commutative Algebra · Mathematics 2014-04-16 Najib Mahdou , Moutu Abdou Salam Moutui

The undirected zero divisor graph of a commutative ring with unity \( R \), denoted by \( \Gamma(R) = (V(\Gamma(R)), E(\Gamma(R))) \). The vertex set \( V(\Gamma(R)) \) consists of all the non-zero zero-divisors of \( R \). The edge set \(…

Combinatorics · Mathematics 2026-03-23 Vidya S , Sunny Kumar Sharma , Prasanna Poojary , Vadiraja Bhatta G R

A famous conjecture about group algebras of torsion-free groups states that there is no zero divisor in such group algebras. A recent approach to settle the conjecture is to show the non-existence of zero divisors with respect to the length…

Group Theory · Mathematics 2023-05-19 Alireza Abdollahi , Zahra Taheri

Let $\Gamma(\mathbb{Z}_n[i])$ be the zero divisor graph over the ring $\mathbb{Z}_n[i]$. In this article, we study pancyclic properties of $\Gamma(\mathbb{Z}_n[i])$ and $\overline{\Gamma(\mathbb{Z}_n[i])}$ for different $n$. Also, we prove…

Combinatorics · Mathematics 2018-06-22 Ravindra Kumar , Om Prakash

Let $R\ $be an integral domain and $R^{\#}$ the set of all nonzero nonunits of $R.\ $For every elements $a,b\in R^{\#},$ we define $a\sim b$ if and only if $aR=bR,$ that is, $a$ and $b$ are associated elements. Suppose that $EC(R^{\#})$ is…

Commutative Algebra · Mathematics 2025-02-19 Uğur Yiğit , Suat Koç

In this article, we compile the work done by various mathematicians on the topic of the fixed divisor of a polynomial. This article explains most of the results concisely and is intended to be an exhaustive survey. We present the results on…

Number Theory · Mathematics 2020-09-02 Devendra Prasad , Krishnan Rajkumar , A. Satyanarayana Reddy

A $k$-regular graph on $v$ vertices is a {\em divisible design graph} if there exist integers $\lambda_1,\lambda_2,m,n$ such that the vertex set can be partitioned into $m$ classes of size $n$ and any two different vertices from the same…

Combinatorics · Mathematics 2025-02-19 Vladislav V. Kabanov

In a recent paper, Grau et al. (2017) studied the zero divisor graphs of the ring of Lipschitz integers modulo $n$, and computed the domination number of the undirected zero divisor graph of the ring of Lipschitz integers modulo $n$. But…

Combinatorics · Mathematics 2020-08-13 Hengbin Zhang

Let $R$ be a commutative ring with unity. The prime ideal sum graph of the ring $R$ is a simple undirected graph whose vertex set is the set of nonzero proper ideals of $R$ and two distinct vertices $I$ and $J$ are adjacent if and only if…

Combinatorics · Mathematics 2023-08-09 Praveen Mathil , Jitender Kumar

The weakly zero-divisor graph $W\Gamma(R)$ of a commutative ring $R$ is the simple undirected graph whose vertices are nonzero zero-divisors of $R$ and two distinct vertices $x$, $y$ are adjacent if and only if there exist $w\in {\rm…

Combinatorics · Mathematics 2025-04-25 Mohd Shariq , Jitender Kumar

We introduce the factorization graph of a finite group and study its connectedness and forbidden structures. We characterize all finite groups with connected factorization graphs and classify those with connected bipartite factorization…

Group Theory · Mathematics 2019-12-02 Mohammad Farrokhi Derakhshandeh Ghouchan , Ali Azimi

Gcd-graphs over the ring of integers modulo $n$ are a simple and elegant class of integral graphs. The study of these graphs connects multiple areas of mathematics, including graph theory, number theory, and ring theory. In a recent work,…

Number Theory · Mathematics 2024-11-05 Ján Mináč , Tung T. Nguyen , Nguyen Duy Tân

Let overline{\Gamma(R)} be the complement of zero divisor graph of a finite commutative ring R. In this article, we have provided the answer of the question (ii) raised by Osba and Alkam in their paper and prove that overline{\Gamma(R)} is…

Combinatorics · Mathematics 2017-11-06 Ravindra Kumar , Om Prakash

We study the binomial and monomial ideals arising from linear equivalence of divisors on graphs from the point of view of Gr\"obner theory. We give an explicit description of a minimal Gr\"obner bases for each higher syzygy module. In each…

Combinatorics · Mathematics 2019-10-21 Fatemeh Mohammadi , Farbod Shokrieh

In this paper, we consider five possible extensions of the Pr\"ufer domain notion to the case of commutative rings with zero divisors. We investigate the transfer of these Pr\"ufer-like properties between a commutative ring and its subring…

Commutative Algebra · Mathematics 2007-12-04 C. Bakkari , N. Mahdou , H. Mouanis

Let $R$ be a commutative ring with identity, and let $Z(R)$ be the set of zero-divisors of $R$. The annihilator graph of $R$ is defined as the undirected graph $AG(R)$ with the vertex set $Z(R)^*=Z(R)\setminus\{0\}$, and two distinct…

Combinatorics · Mathematics 2017-01-30 Mohammad Javad Nikmehr , Reza Nikandish , Moharam Bakhtyiari

The inclusion ideal graph of a commutative unitary ring $R$ is the (undirected) graph $In(R)$ whose vertices all non-trivial ideals of $R$ and two distinct vertices are adjacent if and only if one of them is a proper subset of the other…

Combinatorics · Mathematics 2025-06-10 E. Dodongeh , A. Moussavi , R. Nikandish

Godsil (1985) defined a graph to be invertible if it has a non-singular adjacency matrix whose inverse is diagonally similar to a nonnegative integral matrix; the graph defined by the last matrix is then the inverse of the original graph.…

Combinatorics · Mathematics 2018-10-30 Sona Pavlikova , Daniel Sevcovic

The study of graphs associated with of various algebraic structures is an emerging topic in algebraic graph theory. Recently, the concept of nonzero component graph of a finite dimensional vector space $\Gamma(\mathbb{V})$ was put forward…

Combinatorics · Mathematics 2026-04-09 Sunilkumar M. Hosamani
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