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Monochromatic cycles and monochromatic paths in arc-colored digraphs

Hortensia Galeana-SánchezGuadalupe Gaytán-GómezRocío Rojas-Monroy — 2011

Discussiones Mathematicae Graph Theory

We call the digraph D an m-colored digraph if the arcs of D are colored with m colors. A path (or a cycle) is called monochromatic if all of its arcs are colored alike. A cycle is called a quasi-monochromatic cycle if with at most one exception all of its arcs are colored alike. A subdigraph H in D is called rainbow if all its arcs have different colors. A set N ⊆ V(D) is said to be a kernel by monochromatic paths if it satisfies the following two conditions: (i) for every pair of different vertices...

γ-Cycles In Arc-Colored Digraphs

Hortensia Galeana-SánchezGuadalupe Gaytán-GómezRocío Rojas-Monroy — 2016

Discussiones Mathematicae Graph Theory

We call a digraph D an m-colored digraph if the arcs of D are colored with m colors. A directed path (or a directed cycle) is called monochromatic if all of its arcs are colored alike. A subdigraph H in D is called rainbow if all of its arcs have different colors. A set N ⊆ V (D) is said to be a kernel by monochromatic paths of D if it satisfies the two following conditions: for every pair of different vertices u, v ∈ N there is no monochromatic path in D between them, and for every vertex x ∈ V...

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