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We study the Betti numbers of binomial edge ideal associated to some classes of graphs with large Castelnuovo-Mumford regularity. As an application we give several lower bounds of the Castelnuovo-Mumford regularity of arbitrary graphs…

Commutative Algebra · Mathematics 2013-10-16 Zohaib Zahid , Sohail Zafar

We study the licci property for several classes of squarefree monomial ideals arising from graphs and related combinatorial structures. We characterize licci bi-Cohen-Macaulay squarefree monomial ideals, complementary edge ideals, $t$-path…

Commutative Algebra · Mathematics 2026-03-17 Om Prakash Bhardwaj , Trung Chau , Omkar Javadekar

In this paper, we study the Hankel edge ideals of graphs. We determine the minimal prime ideals of the Hankel edge ideal of labeled Hamiltonian and semi-Hamiltonian graphs, and we investigate radicality, being a complete intersection,…

Commutative Algebra · Mathematics 2022-05-13 Dariush Kiani , Sara Saeedi Madani , Saeed Tafazolian

Parity binomial edge ideals of simple undirected graphs are introduced. Unlike binomial edge ideals, they do not have square-free Gr\"obner bases and are radical if only if the graph is bipartite or the characteristic of the ground field is…

Commutative Algebra · Mathematics 2017-02-15 Thomas Kahle , Camilo Sarmiento , Tobias Windisch

Let $G$ be a simple graph on $n$ vertices. Let $L_G \text{ and } \mathcal{I}_G \: $ denote the Lov\'asz-Saks-Schrijver(LSS) ideal and parity binomial edge ideal of $G$ in the polynomial ring $S = \mathbb{K}[x_1,\ldots, x_n, y_1, \ldots,…

Commutative Algebra · Mathematics 2021-12-07 Arvind Kumar

Let $R = k[x_1,\ldots, x_n]$ be the polynomial ring in $n$ variables over a field $k$ and let $I$ be a monomial ideal of $R$. In this paper, we study almost Cohen-Macaulay simplicial complex. Moreover, we characterize the almost…

Commutative Algebra · Mathematics 2022-04-19 Amir Mafi , Dler Naderi

We introduce a family of squarefree monomial ideals associated to finite simple graphs, whose monomial generators correspond to closed neighborhood of vertices of the underlying graph. Any such ideal is called the closed neighborhood ideal…

Commutative Algebra · Mathematics 2020-03-11 Leila Sharifan , Somayeh Moradi

In this article, we survey the recent results on the Castelnuovo-Mumford regularity of binomial edge ideals and generalized binomial edge ideals. We also generalize some of the known upper bounds for binomial edge ideals to the case of…

Commutative Algebra · Mathematics 2025-08-19 A. V. Jayanthan , Arvind Kumar

Let $R=K[x_1,\ldots, x_n]$ be the polynomial ring in $n$ variables over a field $K$ and $I$ be monomial ideal of $R$. In this paper, we show that if $I$ is a generic monomial ideal, then $R/I$ is pretty clean if and only if $R/I$ is…

Commutative Algebra · Mathematics 2025-02-28 Amir Mafi , Rando Rasul Qadir , Hero Saremi

In this paper, we prove the upper bound conjecture proposed by Saeedi Madani \& Kiani on the Castelnuovo-Mumford regularity of generalized binomial edge ideals. We give a combinatorial upper bound of regularity for generalized binomial edge…

Commutative Algebra · Mathematics 2025-12-02 Anuvinda J , Ranjana Mehta , Kamalesh Saha

Let $G$ be a finite simple connected graph on $[n]$ and $R = K[x_1, \ldots, x_n]$ the polynomial ring in $n$ variables over a field $K$. The edge ideal of $G$ is the ideal $I(G)$ of $R$ which is generated by those monomials $x_ix_j$ for…

Commutative Algebra · Mathematics 2020-08-13 Takayuki Hibi , Hiroju Kanno , Kyouko Kimura , Kazunori Matsuda , Adam Van Tuyl

Let G be a simple undirected graph. We find the number of maximal independent sets in complete t-partite graphs. We will show that vertex decomposability and shellability are equivalent in this graphs. Also, we obtain an equivalent…

Commutative Algebra · Mathematics 2012-05-29 Seyyede Masoome Seyyedi , Farhad Rahmati , Mahdis Saeedi

In this paper we study almost Cohen-Macaulay bipartite graphs. Furthermore, we prove that if $G$ is almost Cohen-Macaulay bipartite graph with at least one vertex of positive degree, then there is a vertex of $\deg(v) \leq 2$. In…

Commutative Algebra · Mathematics 2021-12-21 Amir Mafi , Dler Naderi

We investigate, using the notion of linear quotients, significative classes of connected graphs whose monomial edge ideals, not necessarily squarefree, have linear resolution, in order to compute standard algebraic invariants of the…

Rings and Algebras · Mathematics 2012-10-30 Maurizio Imbesi , Monica La Barbiera

We study the algebraic invariants namely depth, Stanley depth, regularity and projective dimension of the residue class rings of the edge ideals associated with the corona product of various classes of graphs with any graph. We also give an…

Commutative Algebra · Mathematics 2023-07-06 Bakhtawar Shaukat , Muhammad Ishaq , Ahtasham Ul Haq , Zahid Iqbal

In this paper, we study the componentwise linearity of edge ideals of weighted oriented graphs. We show that if $D$ is a weighted oriented graph whose edge ideal $I(D)$ is componentwise linear, then the underlying simple graph $G$ of $D$ is…

Commutative Algebra · Mathematics 2023-10-02 Manohar Kumar , Ramakrishna Nanduri , Kamalesh Saha

In this study, we investigate the binomial edge ring associated with the skew Ferrers diagram. By employing Sagbi basis theory, we construct a quadratic Gr\"{o}bner basis for its defining ideal. As an application, we prove that this ring is…

Commutative Algebra · Mathematics 2025-08-29 Kuei-Nuan Lin , Yi-Huang Shen

We compute one of the distinguished extremal Betti number of the binomial edge ideal of a block graph, and classify all block graphs admitting precisely one extremal Betti number.

Commutative Algebra · Mathematics 2018-02-19 Juergen Herzog , Giancarlo Rinaldo

We show that the universal Gr\"obner basis and the Graver basis of a binomial edge ideal coincide. We provide a description for this basis set in terms of certain paths in the underlying graph. We conjecture a similar result for a parity…

Commutative Algebra · Mathematics 2020-04-08 Mourtadha Badiane , Isaac Burke , Emil Sköldberg

In this article, we characterize the class of complementary edge ideals which satisfy the licci property in terms of the underlying graph. Using this characterization, we associate the licci property of a complementary edge ideal to its…

Commutative Algebra · Mathematics 2026-03-18 Vivek Bhabani Lama