On odd rainbow cycles in edge-colored graphs
On odd rainbow cycles in edge-colored graphs
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DOI:
10.1016/j.ejc.2021.103316
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发表时间:
2019-10
期刊:
影响因子:
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通讯作者:
A. Czygrinow;T. Molla;B. Nagle;Roy Oursler
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文献类型:
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作者:
A. Czygrinow;T. Molla;B. Nagle;Roy Oursler
Abstract Let G=(V, E) be an n-vertex edge-colored graph. In 2013, H. Li proved that if every vertex v∈ V is incident to at least (n+ 1)∕ 2 distinctly colored edges, then G admits a rainbow triangle. We prove that the same hypothesis ensures a rainbow ℓ-cycle C ℓ whenever n≥ 432 ℓ. This result is sharp for all odd integers ℓ≥ 3, and extends earlier work of the authors for when ℓ is even.