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The star chromatic index $\chi_s'(G)$ of a graph $G$ is the minimum number of colors needed to properly color the edges of the graph so that no path or cycle of length four is bi-colored. We obtain a near-linear upper bound in terms of the…

Combinatorics · Mathematics 2015-03-17 Zdeněk Dvořák , Bojan Mohar , Robert Šámal

A star edge coloring of a graph $G$ is a proper edge coloring of $G$ such that every path and cycle of length four in $G$ uses at least three different colors. The star chromatic index of $G$, is the smallest integer $k$ for which $G$…

Combinatorics · Mathematics 2021-03-03 Marzieh Vahid Dastjerdi

A star edge coloring of a graph $G$ is a proper edge coloring of $G$ without bichromatic paths or cycles of length four. The it star chromatic index, $\chi_{st}^{'} (G ),$ of $G$ is the minimum number $k$ for which $G$ has a star edge…

Combinatorics · Mathematics 2020-06-02 Xingchao Deng , Qingye Yao , Yanbing Zhang , Xudong Cui

A star edge coloring of a graph $G$ is a proper edge coloring of $G$ such that no path or cycle of length four is bi-colored. The star chromatic index of $G$, denoted by $\chi^{\prime}_{s}(G)$, is the minimum $k$ such that $G$ admits a star…

Combinatorics · Mathematics 2019-11-07 Behnaz Omoomi , Marzieh Vahid Dastjerdi , Yasaman Yektaeian

The star chromatic index of a graph $G$, denoted by $\chi'_{st}(G) $, is the minimum number of colors needed to properly color the edges of $G$ such that no path or cycle of length four is bi-colored. Casselgren et al. and Hou et al.…

Combinatorics · Mathematics 2025-11-18 Xingxing Hu , Yunfang Tang

The star chromatic index of a multigraph $G$, denoted $\chi'_{st}(G)$, is the minimum number of colors needed to properly color the edges of $G$ such that no path or cycle of length four is bicolored. We survey the results of determining…

Combinatorics · Mathematics 2020-09-18 Hui Lei , Yongtang Shi

{\emph A star edge-coloring} of a graph is a proper edge-coloring without bichromatic paths and cycles of length four. In this paper, we consider the list version of this coloring and prove that the list star chromatic index of every…

Combinatorics · Mathematics 2018-09-11 Borut Lužar , Martina Mockovčiaková , Roman Soták

The star chromatic index of a multigraph $G$, denoted $\chi'_{s}(G)$, is the minimum number of colors needed to properly color the edges of $G$ such that no path or cycle of length four is bi-colored. A multigraph $G$ is star…

Combinatorics · Mathematics 2022-06-13 Hui Lei , Yongtang Shi , Zi-Xia Song , Tao Wang

The star chromatic index of a multigraph $G$, denoted by $\chi_{\mathrm{star}}'(G)$, is the minimum number of colors needed to properly color the edges of $G$ such that no path or cycle of length $4$ is bicolored. In this paper, we study…

Combinatorics · Mathematics 2020-10-28 Xuling Hou , Lingxi Li , Tao Wang

A star edge-coloring of a graph $G$ is a proper edge-coloring without bichromatic paths or cycles of length four. The smallest integer $k$ such that $G$ admits a star edge-coloring with $k$ colors is the star chromatic index of $G$. In the…

Combinatorics · Mathematics 2020-10-23 Přemysl Holub , Borut Lužar , Erika Mihaliková , Martina Mockovčiaková , Roman Soták

The star chromatic index of a multigraph $G$, denoted $\chi'_{s}(G)$, is the minimum number of colors needed to properly color the edges of $G$ such that no path or cycle of length four is bi-colored. A multigraph $G$ is star…

Combinatorics · Mathematics 2017-11-23 Hui Lei , Yongtang Shi , Zi-Xia Song

A star edge coloring of a graph $G$ is a proper edge coloring of $G$ such that every path and cycle of length four in $G$ uses at least three different colors. The star chromatic index of a graph $G$, is the smallest integer $k$ for which…

Combinatorics · Mathematics 2018-11-22 Behnaz Omoomi , Marzieh Vahid Dastjerdi

The star chromatic index of a graph $G$, denoted by $\chi^\prime_s(G)$, is the smallest integer $k$ for which $G$ admits a proper edge coloring with $k$ colors such that every path and cycle of length four is not bicolored. Let $d$ be the…

Combinatorics · Mathematics 2024-10-22 Behnaz Omoomi Marzieh Vahid Dastjerdi

\textit{A star edge coloring} of a graph is a proper edge coloring without bichromatic paths and cycles of length four. In this paper we establish tight upper bounds for trees and subcubic outerplanar graphs, and derive an upper bound for…

A strong $k$-edge-coloring of a graph G is an edge-coloring with $k$ colors in which every color class is an induced matching. The strong chromatic index of $G$, denoted by $\chi'_{s}(G)$, is the minimum $k$ for which $G$ has a strong…

Combinatorics · Mathematics 2018-09-11 Tianjiao Dai , Guanghui Wang , Donglei Yang , Gexin Yu

An injective edge-coloring $c$ of a graph $G$ is an edge-coloring such that if $e_1$, $e_2$, and $e_3$ are three consecutive edges in $G$ (they are consecutive if they form a path or a cycle of length three), then $e_1$ and $e_3$ receive…

Combinatorics · Mathematics 2020-09-01 Baya Ferdjallah , Samia Kerdjoudj , Andre Raspaud

For a bipartite graph $G$ with parts $X$ and $Y$, an $X$-interval coloring is a proper edge coloring of $G$ by integers such that the colors on the edges incident to any vertex in $X$ form an interval. Denote by $\chi'_{int}(G,X)$ the…

Combinatorics · Mathematics 2021-06-29 Carl Johan Casselgren

A star $k$-edge coloring is a proper edge coloring such that there are no bichromatic paths or cycles of length four. The smallest integer $k$ such that $G$ admits a star $k$-edge coloring is the star chromatic index of $G$. Deng \etal…

Combinatorics · Mathematics 2021-06-22 Zhengke Miao , Yimin Song , Tao Wang , Xiaowei Yu

A \emph{star coloring} of a graph $G$ is a proper vertex-coloring such that no path on four vertices is $2$-colored. The minimum number of colors required to obtain a star coloring of a graph $G$ is called star chromatic number and it is…

Combinatorics · Mathematics 2023-05-30 Harshit Kumar Choudhary , I. Vinod Reddy

If $k\geq 0$, then a $k$-edge-coloring of a graph $G$ is an assignment of colors to edges of $G$ from the set of $k$ colors, so that adjacent edges receive different colors. A $k$-edge-colorable subgraph of $G$ is maximum if it is the…

Discrete Mathematics · Computer Science 2018-07-18 Liana Karapetyan , Vahan Mkrtchyan
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