## Abstract It is well known that every planar graph __G__ is 2‐colorable in such a way that no 3‐cycle of __G__ is monochromatic. In this paper, we prove that __G__ has a 2‐coloring such that no cycle of length 3 or 4 is monochromatic. The complete graph __K__~5~ does not admit such a coloring. On
Monochromatic cycle partitions of edge-colored graphs
✍ Scribed by Gábor N. Sárközy
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 88 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0364-9024
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✦ Synopsis
In this article we study the monochromatic cycle partition problem for non-complete graphs. We consider graphs with a given independence number (G) = . Generalizing a classical conjecture of Erd" os, Gyárfás and Pyber, we conjecture that if we r-color the edges of a graph G with (G) = , then the vertex set of G can be partitioned into at most r vertex disjoint monochromatic cycles. In the direction of this conjecture we show that under these conditions the vertex set of G can be partitioned into at most 25( r) 2 log( r) vertex disjoint monochromatic cycles. ᭧ 2010 Wiley
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