Results 21 to 30 of about 5,252 (152)

Strong edge-coloring of $(3, Δ)$-bipartite graphs

open access: yesDiscret. Math., 2014
A strong edge-coloring of a graph $G$ is an assignment of colors to edges such that every color class induces a matching. We here focus on bipartite graphs whose one part is of maximum degree at most $3$ and the other part is of maximum degree $Δ$. For every such graph, we prove that a strong $4Δ$-edge-coloring can always be obtained.
Julien Bensmail   +2 more
openaire   +3 more sources

Parity and strong parity edge-colorings of graphs

open access: yesJournal of Combinatorial Optimization, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Hsiang-Chun Hsu, Gerard J. Chang
openaire   +4 more sources

Distance-Local Rainbow Connection Number

open access: yesDiscussiones Mathematicae Graph Theory, 2022
Under an edge coloring (not necessarily proper), a rainbow path is a path whose edge colors are all distinct. The d-local rainbow connection number lrcd(G) (respectively, d-local strong rainbow connection number lsrcd(G)) is the smallest number of colors
Septyanto Fendy, Sugeng Kiki A.
doaj   +1 more source

r-Strong edge colorings of graphs

open access: yesDiscrete Mathematics, 2006
If \(G\) is a graph and \(n\) a natural number, \(\chi(G,n)\) denotes the minimum number of colours required for a proper edge colouring of \(G\) in which no two vertices with distance at most \(n\) are incident to edges coloured with the same set of colours.
Saeed Akbari, Hoda Bidkhori, N. Nosrati
openaire   +2 more sources

The Strong 3-Rainbow Index of Graphs Containing Three Cycles

open access: yesInPrime, 2023
The concept of a strong k-rainbow index is a generalization of a strong rainbow connection number, which has an interesting application in security systems in a communication network.
Zata Yumni Awanis
doaj   +1 more source

Characterizations of Graphs Having Large Proper Connection Numbers

open access: yesDiscussiones Mathematicae Graph Theory, 2016
Let G be an edge-colored connected graph. A path P is a proper path in G if no two adjacent edges of P are colored the same. If P is a proper u − v path of length d(u, v), then P is a proper u − v geodesic. An edge coloring c is a proper-path coloring of
Lumduanhom Chira   +2 more
doaj   +1 more source

On Proper (Strong) Rainbow Connection of Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2021
A path in an edge-colored graph G is called a rainbow path if no two edges on the path have the same color. The graph G is called rainbow connected if between every pair of distinct vertices of G, there is a rainbow path.
Jiang Hui   +3 more
doaj   +1 more source

Some Equal Degree Graph Edge Chromatic Number

open access: yesMATEC Web of Conferences, 2016
Let G(V, E) be a simple graph and k is a positive integer, if it exists a mapping of f, and satisfied with f(e1)≠6 = f(e2) for two incident edges e1,e2∉E(G), f(e1)≠6=f(e2), then f is called the k-proper-edge coloring of G(k-PEC for short).
Liu Jun   +4 more
doaj   +1 more source

The strong chromatic index of 1-planar graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science
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.
Yiqiao Wang   +3 more
doaj   +1 more source

Strong Chromatic Index Of Planar Graphs With Large Girth

open access: yesDiscussiones Mathematicae Graph Theory, 2014
Let Δ ≥ 4 be an integer. In this note, we prove that every planar graph with maximum degree Δ and girth at least 1 Δ+46 is strong (2Δ−1)-edgecolorable, that is best possible (in terms of number of colors) as soon as G contains two adjacent vertices of ...
Jennhwa Chang Gerard   +3 more
doaj   +1 more source

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