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首页> 外文期刊>Journal of Graph Theory >Disjoint 3-Cycles in Tournaments: A Proof of The Bermond– Thomassen Conjecture for Tournaments?
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Disjoint 3-Cycles in Tournaments: A Proof of The Bermond– Thomassen Conjecture for Tournaments?

机译:锦标赛中不连续的3个周期:Bermond-Thomassen锦标赛猜想的证明?

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摘要

We prove that every tournament with minimum out-degree at least 2k ? 1 contains k disjoint 3-cycles. This provides additional support for the conjecture by Bermond and Thomassen that every digraph D of minimum out-degree 2k ? 1 contains k vertex disjoint cycles. We also prove that for every ε > 0, when k is large enough, every tournament with minimum out-degree at least (1.5 + ε)k contains k disjoint cycles. The linear factor 1.5 is best possible as shown by the regular tournaments.
机译:我们证明每场比赛的最低学位至少2k吗? 1包含k个不相交的3个周期。这为贝蒙德和托马森的猜想提供了额外的支持,即每张图D的最小向外度2k? 1包含k个顶点不相交的周期。我们还证明,对于每个ε> 0,当k足够大时,每个最小出局度至少(1.5 +ε)k的锦标赛都包含k个不连续的循环。如常规比赛所示,线性系数最好为1.5。

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