论文标题

加莱·拉姆齐(Gallai Ramsey)的双星号

Gallai Ramsey number for double stars

论文作者

Katona, Gyula O. H., Magnant, Colton, Mao, Yaping, Wang, Zhao

论文摘要

鉴于图$ g $和一个正整数$ k $,\ emph {gallai-ramsey number}被定义为最小数量的顶点$ n $,因此$ k_n $的任何$ k $ - edge颜色都包含彩虹(所有不同的颜色)$ g $ of $ g $或$ g $的单色副本。在本文中,我们在Double Stars $ s(n,m)$的Gallai-Ramsey数字上获得了一般的上限和下限,其中$ s(n,m)$是从两星$ k_ {1,n} $和$ k_ {1,m} $的图表中获得的图,通过在其中心之间添加一个边缘。在某些情况下,我们还提供了鲜明的结果。

Given a graph $G$ and a positive integer $k$, the \emph{Gallai-Ramsey number} is defined to be the minimum number of vertices $n$ such that any $k$-edge coloring of $K_n$ contains either a rainbow (all different colored) copy of $G$ or a monochromatic copy of $G$. In this paper, we obtain general upper and lower bounds on the Gallai-Ramsey numbers for double stars $S(n,m)$, where $S(n,m)$ is the graph obtained from the union of two stars $K_{1,n}$ and $K_{1,m}$ by adding an edge between their centers. We also provide the sharp result in some cases.

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