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Related papers: Normal edge ideals of edge-weighted graphs

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We classify all graphs for which the Rees algebras of their edge ideals are normal and have regularity equal to their matching numbers.

Commutative Algebra · Mathematics 2024-05-21 Cao Huy Linh , Quang Hoa Tran , Thanh Vu

Let $G_\omega$ be an edge-weighted simple graph. In this paper, we give a complete characterization of the graph $G_\omega$ whose edge ideal $I(G_\omega)$ is integrally closed. We also show that if $G_\omega$ is an edge-weighted star graph,…

Commutative Algebra · Mathematics 2023-08-14 Shiya Duan , Guangjun Zhu , Yijun Cui , Jiaxin Li

This paper presents exact formulas for the regularity and depth of powers of edge ideals of an edge-weighted star graph. Additionally, we provide exact formulas for the regularity of powers of the edge ideal of an edge-weighted integrally…

Commutative Algebra · Mathematics 2024-01-05 Guangjun Zhu , Shiya Duan , Yijun Cui , Jiaxin Li

We give a complete characterization of graphs whose binomial edge ideal is licci. An important tool is a new general upper bound for the regularity of binomial edge ideals.

Commutative Algebra · Mathematics 2019-10-10 Viviana Ene , Giancarlo Rinaldo , Naoki Terai

We introduce and study the concept which we call the splitting of a graph and compare algebraic properties of the edge ideals of graphs and those of their splitting graphs.

Commutative Algebra · Mathematics 2019-08-27 Jürgen Herzog , Somayeh Moradi , Masoomeh Rahimbeigi

We determine the arithmetical rank of every edge ideal of a Ferrers graph.

Commutative Algebra · Mathematics 2007-05-23 Margherita Barile

Let $D$ be a weighted oriented graph with the underlying graph $G$ and $I(D), I(G) $ be the edge ideals corresponding to $D$ and $G$ respectively. We show that the regularity of edge ideal of a certain class of weighted oriented graph…

Combinatorics · Mathematics 2022-04-12 Mousumi Mandal , Dipak Kumar Pradhan

Let $G$ be a simple graph on $n$ vertices and $\mathcal{I}_G$ denotes parity binomial edge ideal of $G$ in the polynomial ring $S = \mathbb{K}[x_1,\ldots, x_n, y_1, \ldots, y_n].$ We obtain a lower bound for the regularity of parity…

Commutative Algebra · Mathematics 2021-08-20 Arvind Kumar

We characterize all graphs whose binomial edge ideals have pure resolutions. Moreover, we introduce a new switching of graphs which does not change some algebraic invariants of graphs, and using this, we study the linear strand of the…

Combinatorics · Mathematics 2014-01-22 Dariush Kiani , Sara Saeedi Madani

We determine all possible triples of depth, dimension, and regularity of edge ideals of weighted oriented graphs with a fixed number of vertices. Also, we compute all the possible Betti table sizes of edge ideals of weighted oriented trees…

Commutative Algebra · Mathematics 2025-04-18 Trung Chau , Richie Sheng , Deborah Wooton

In this paper, we introduce the concept of complementary edge ideals of graphs and study their algebraic properties and invariants.

Commutative Algebra · Mathematics 2025-08-22 Takayuki Hibi , Ayesha Asloob Qureshi , Sara Saeedi Madani

In this paper, we describe primary decomposition of the edge ideal of the join of some graphs in terms of that information of the edge ideal of every weighted oriented graph. Meanwhile, we also study depth and regularity of symbolic powers…

Commutative Algebra · Mathematics 2022-09-15 Yijun Cui , Guangjun Zhu , Xiaoqi Wei

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

Let $G$ be a graph and $I(G)$ its edge ideal. In this paper, we give a complete characterization of the graphs $G$ for which $\reg(R/I(G)) = 3$.

Commutative Algebra · Mathematics 2026-03-25 Akane Kanno

This paper gives exact formulas for the regularity of edge ideals of edge-weighted integrally closed trees. In addition, we provide some linear upper bounds on the regularity of powers of such ideals.

Commutative Algebra · Mathematics 2024-03-07 Jiaxin Li , Guangjun Zhu , Shiya Duan

We compute the depth and (give bounds for) the regularity of generalized binomial edge ideals associated with generalized block graphs.

Commutative Algebra · Mathematics 2017-09-25 Faryal Chaudhry , Rida Irfan

We compute the multigraded Betti numbers of edge ideals for weighted oriented crown graphs using a novel approach. This approach, which we still call the \emph{induced subgraph approach}, originates from our prior work on computing Betti…

Commutative Algebra · Mathematics 2025-05-13 Zexin Wang , Dancheng Lu

We classify connected graphs $G$ whose binomial edge ideal is Gorenstein. The proof uses methods in prime characteristic.

Commutative Algebra · Mathematics 2021-02-23 René González-Martínez

We study weighted graphs and their "edge ideals" which are ideals in polynomial rings that are defined in terms of the graphs. We provide combinatorial descriptions of m-irreducible decompositions for the edge ideal of a weighted graph in…

Commutative Algebra · Mathematics 2013-02-26 Chelsey Paulsen , Sean Sather-Wagstaff

For a finite simple graph $G$ we give an upper bound for the regularity of the powers of the edge ideal $I(G)$.

Commutative Algebra · Mathematics 2018-10-16 Jürgen Herzog , Takayuki Hibi
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