arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.09178math.CO
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最小度大的边着色图的单色分支

Monochromatic Components in Edge-Coloured Graphs with Large Minimum Degree

Hannah Guggiari, Alex Scott

摘要:

对于每个$n\in\mathbb{N}$和$k\geq2$,已知完全图的$n$顶点上的每个$k$ -边染色都包含一个阶至少为$\frac{n}{k-1}$的单色连通分支.对于$k\geq3$,已知对于某个常数$\varepsilon_k$,完全图可以用具有$δ(G)\geq(1-\varepsilon_k)n$的图$G$代替。本文证明了$\varepsilon_3$的最大可能值是$\frac16$。这证明了Gyárfas和Sárközy的一个猜想是错误的。

英文摘要:

For every $n\in\mathbb{N}$ and $k\geq2$, it is known that every $k$-edge-colouring of the complete graph on $n$ vertices contains a monochromatic connected component of order at least $\frac{n}{k-1}$. For $k\geq3$, it is known that the complete graph can be replaced by a graph $G$ with $δ(G)\geq(1-\varepsilon_k)n$ for some constant $\varepsilon_k$. In this paper, we show that the maximum possible value of $\varepsilon_3$ is $\frac16$. This disproves a conjecture of Gyárfas and Sárközy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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