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A strong edge coloring of a graph $G$ is an assignment of colors to the edges of $G$ such that two distinct edges are colored differently if they are incident to a common edge or share an endpoint. The strong chromatic index of a graph $G$,…

组合数学 · 数学 2025-07-17 Yunfang Tang , Zhiwei Bi

A strong edge-coloring of a graph $G$ is an edge-coloring such that no two edges of distance at most two receive the same color. The strong chromatic index $\chi'_s(G)$ is the minimum number of colors in a strong edge-coloring of $G$. P.…

组合数学 · 数学 2015-10-06 Chuanyun Zang

A strong edge-coloring of a graph $G$ is an edge-coloring such that any two edges on a path of length three receive distinct colors. We denote the strong chromatic index by $\chi_{s}'(G)$ which is the minimum number of colors that allow a…

组合数学 · 数学 2018-01-23 Baochen Zhang , Yulin Chang , Jie Hu , Meijie Ma , Donglei Yang

The strong chromatic index of a graph $G$, denoted $\chi_s'(G)$, is the least number of colors needed to edge-color $G$ so that edges at distance at most two receive distinct colors. The strong list chromatic index, denoted…

A {\em strong $k$-edge-coloring} of a graph $G$ is a mapping from $E(G)$ to $\{1,2,\ldots,k\}$ such that every two adjacent edges or two edges adjacent to the same edge receive distinct colors. The {\em strong chromatic index} $\chi_s'(G)$…

组合数学 · 数学 2018-01-24 Ilkyoo Choi , Jaehoon Kim , Alexandr V. Kostochka , André Raspaud

A {\em strong edge coloring} of a graph is a proper edge coloring in which every color class is an induced matching. The {\em strong chromatic index} of a graph is the minimum number of colors needed to obtain a strong edge coloring. In an…

组合数学 · 数学 2017-04-17 Watcharintorn Ruksasakchai , Tao Wang

A strong edge-coloring of a graph $G$ is a coloring of the edges such that every color class induces a matching in $G$. The strong chromatic index of a graph is the minimum number of colors needed in a strong edge-coloring of the graph. In…

组合数学 · 数学 2018-06-20 Mingfang Huang , Michael Santana , Gexin Yu

A strong edge coloring of a graph is a proper edge coloring in which every color class is an induced matching. The strong chromatic index $\chi_s'(G)$ of a graph $G$ is the minimum number of colors in a strong edge coloring of $G$. Let…

组合数学 · 数学 2018-02-20 Tao Wang , Xiaodan Zhao

Let $G$ be a graph and $k$ a positive integer. A strong $k$-edge-coloring of $G$ is a mapping $\phi: E(G)\to \{1,2,\dots,k\}$ such that for any two edges $e$ and $e'$ that are either adjacent to each other or adjacent to a common edge,…

组合数学 · 数学 2022-07-22 Yuquan Lin , Wensong Lin

A coloring of the edges of a graph $G$ is strong if each color class is an induced matching of $G$. The strong chromatic index of $G$, denoted by $\chi_{s}^{\prime}(G)$, is the least number of colors in a strong edge coloring of $G$. In…

组合数学 · 数学 2016-08-11 Michał Dębski , Jarosław Grytczuk , Małgorzata Śleszyńska-Nowak

A {\em strong edge coloring} of a graph $G$ is a proper edge coloring in which every color class is an induced matching. The {\em strong chromatic index} $\chiup_{s}'(G)$ of a graph $G$ is the minimum number of colors in a strong edge…

组合数学 · 数学 2022-06-13 Tao Wang

A strong $k$-edge-coloring of a graph $G$ is a mapping from $E(G)$ to $\{1,2,\ldots,k\}$ such that every pair of distinct edges at distance at most two receive different colors. The strong chromatic index $\chi'_s(G)$ of a graph $G$ is the…

组合数学 · 数学 2015-09-28 Gerard Jennhwa Chang , Guan-Huei Duh

A strong edge-coloring of a graph is a proper edge-coloring, in which the edges of every path of length 3 receive distinct colors; in other words, every pair of edges at distance at most 2 must be colored differently. The least number of…

组合数学 · 数学 2025-12-03 Borut Lužar , Edita Máčajová , Roman Soták , Diana Švecová

The strong chromatic index of a multigraph is the minimum $k$ such that the edge set can be $k$-colored requiring that each color class induces a matching. We verify a conjecture of Faudree, Gy\'{a}rf\'{a}s, Schelp and Tuza, showing that…

组合数学 · 数学 2015-08-03 A. V. Kostochka , X. Li , W. Ruksasakchai , M. Santana , T. Wang , G. Yu

A strong edge-coloring of a graph $G$ is an edge-coloring in which every color class is an induced matching, and the strong chromatic index $\chi_s'(G)$ is the minimum number of colors needed in strong edge-colorings of $G$. A graph is…

组合数学 · 数学 2023-01-31 Gexin Yu , Rachel Yu

The chromatic index $\chi'(G)$ of a graph $G$ is the smallest $k$ for which $G$ admits an edge $k$-coloring such that any two adjacent edges have distinct colors. The strong chromatic index $\chi'_s(G)$ of $G$ is the smallest $k$ such that…

组合数学 · 数学 2025-01-22 Yiqiao Wang , Ning Song , Jianfeng Wang , Weifan Wang

A strong edge colouring of a graph is an assignment of colours to the edges of the graph such that for every colour, the set of edges that are given that colour form an induced matching in the graph. The strong chromatic index of a graph…

组合数学 · 数学 2013-08-20 Manu Basavaraju , Mathew C. Francis

A star edge coloring of a graph is a proper edge coloring with no $2$-colored path or cycle of length four. The star chromatic index $\chi'_{st}(G)$ of $G$ is the minimum number $t$ for which $G$ has a star edge coloring with $t$ colors. We…

组合数学 · 数学 2021-05-12 Carl Johan Casselgren , Jonas B. Granholm , André Raspaud

A strong edge-coloring of a graph $G$ is an edge-coloring such that any two edges of distance at most two receive distinct colors. The minimum number of colors we need in order to give $G$ a strong edge-coloring is called the strong…

组合数学 · 数学 2025-12-30 Runze Wang

A strong edge coloring of a graph $G$ is a proper edge coloring in which each color class is an induced matching of $G$. In 1993, Brualdi and Quinn Massey proposed a conjecture that every bipartite graph without $4$-cycles and with the…

组合数学 · 数学 2013-12-09 Borut Lužar , Martina Mockovčiaková , Roman Soták , Riste Škrekovski
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