Results 21 to 30 of about 9,430 (262)
Discrete Mathematics, 1996 The authors investigate the largest fraction of edges in a 3-regular graph that can be colored in 3 colors. They show that this fraction is always at least 13/15 and sometimes at most 25/27. They investigate the analogous problem for graphs of maximum degree 3 and also for 4-regular graphs with 4 colors instead of 3.
Michael O. Albertson, Ruth Haas
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Graphs with coloring redundant edges
Electronic Journal of Graph Theory and Applications, 2016 A graph edge is $d$-coloring redundant if the removal of the edge doesnot change the set of $d$-colorings of the graph. Graphs that are toosparse or too dense do not have coloring redundant edges.
Bart Demoen, Phuong-Lan Nguyen
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Discrete Mathematics, 2005 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Martin Kochol +2 more
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On star and biclique edge‐colorings [PDF]
International Transactions in Operational Research, 2016 AbstractA biclique of G is a maximal set of vertices that induces a complete bipartite subgraph of G with at least one edge, and a star of a graph G is a maximal set of vertices that induces a complete bipartite graph . A biclique (resp. star) edge‐coloring is a coloring of the edges of a graph with no monochromatic bicliques (resp. stars).
Simone Dantas +5 more
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Nonrepetitive edge-colorings of trees [PDF]
Discrete Mathematics & Theoretical Computer Science, 2017 A repetition is a sequence of symbols in which the first half is the same as the second half. An edge-coloring of a graph is repetition-free or nonrepetitive if there is no path with a color pattern that is a repetition.
A. Kündgen, T. Talbot
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Journal of Combinatorial Theory, Series B, 2004 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Paul N. Balister +3 more
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A structural approach to the graceful coloring of a subclass of trees
Heliyon, 2023 Let M={1,2,..m} and G be a simple graph. A graceful m-coloring of G is a proper vertex coloring of G using the colors in M which leads to a proper edge coloring using M∖{m} colors such that the associated color of each edge is the absolute difference ...
Laavanya D, Devi Yamini S
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Electronic Notes in Discrete Mathematics, 2008 Abstract A split graph is a graph whose vertex set admits a partition into a stable set and a clique. The chromatic indexes for some subsets of split graphs, such as split graphs with odd maximum degree and split-indifference graphs, are known. However, for the general class, the problem remains unsolved.
S. M. ALMEIDA +2 more
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Facial graceful coloring of plane graphs [PDF]
Opuscula MathematicaLet \(G\) be a plane graph. Two edges of \(G\) are facially adjacent if they are consecutive on the boundary walk of a face of \(G\). A facial edge coloring of \(G\) is an edge coloring such that any two facially adjacent edges receive different colors ...
Július Czap
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Improved Bounds for Some Facially Constrained Colorings
Discussiones Mathematicae Graph Theory, 2023 A facial-parity edge-coloring of a 2-edge-connected plane graph is a facially-proper edge-coloring in which every face is incident with zero or an odd number of edges of each color. A facial-parity vertex-coloring of a 2-connected plane graph is a proper
Štorgel Kenny
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