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Given a graph $G$ and a positive integer $k$, define the \emph{Gallai-Ramsey number} to be the minimum number of vertices $n$ such that any $k$-edge coloring of $K_n$ contains either a rainbow (all different colored) triangle or a…

组合数学 · 数学 2019-08-08 Yaping Mao , Zhao Wang , Colton Magnant , Ingo Schiermeyer

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…

组合数学 · 数学 2020-01-10 Gyula O. H. Katona , Colton Magnant , Yaping Mao , Zhao Wang

Given a graph $G$ and a positive integer $k$, define the \emph{Gallai-Ramsey number} to be the minimum number of vertices $n$ such that any $k$-edge coloring of the complete graph $K_n$ contains either a rainbow (all different colored)…

组合数学 · 数学 2020-07-15 Yaping Mao , Zhao Wang , Colton Magnant , Ingo Sciermeyer

Given two graphs $G$ and $H$, the $k$-colored Gallai-Ramsey number $gr_k(G : H)$ is defined to be the minimum integer $n$ such that every $k$-coloring of the complete graph on $n$ vertices contains either a rainbow copy of $G$ or a…

组合数学 · 数学 2018-11-16 Xihe Li , Ligong Wang

Given a graph $G$ and a positive integer $k$, define the \emph{Gallai-Ramsey number} to be the minimum number of vertices $n$ such that any $k$-edge coloring of $K_n$ contains either a rainbow (all different colored) triangle or a…

组合数学 · 数学 2019-05-30 Yaping Mao , Zhao Wang , Colton Magnant , Ingo Schiermeyer

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) triangle or a…

组合数学 · 数学 2018-02-15 Jinyu Zou , Yaping Mao , Colton Magnant , Zhao Wang , Chengfu Ye

Given a graph $G$ and a positive integer $k$, define the \emph{Gallai-Ramsey number} to be the minimum number of vertices $n$ such that any $k$-edge coloring of $K_n$ contains either a rainbow (all different colored) triangle or a…

组合数学 · 数学 2019-03-01 Yaping Mao , Zhao Wang , Colton Magnant , Ingo Schiermeyer

Given a graph $H$ and an integer $k\ge1$, the Gallai-Ramsey number $GR_k(H)$ is defined to be the minimum integer $n$ such that every $k$-edge coloring of $K_n$ contains either a rainbow (all different colored) triangle or a monochromatic…

组合数学 · 数学 2021-07-15 Qinghong Zhao , Bing Wei

Given graphs $G$ and $H$ and a positive integer $k$, the \emph{Gallai-Ramsey number}, denoted by $gr_{k}(G : H)$ is defined to be the minimum integer $n$ such that every coloring of $K_{n}$ using at most $k$ colors will contain either a…

组合数学 · 数学 2019-02-05 Xihe Li , Pierre Besse , Colton Magnant , Ligong Wang , Noah Watts

Given two non-empty graphs $G,H$ and a positive integer $k$, the Gallai-Ramsey number $\operatorname{gr}_k(G:H)$ is defined as the minimum integer $N$ such that for all $n\geq N$, every $k$-edge-coloring of $K_n$ contains either a rainbow…

组合数学 · 数学 2021-10-08 Jinyu Zou , Zhao Wang , Hong-Jian Lai , Yaping Mao

Given two graphs $G$ and $H$ and a positive integer $k$, the $k$-color Gallai-Ramsey number, denoted by $gr_{k}(G : H)$, is the minimum integer $N$ such that for all $n \geq N$, every $k$-coloring of the edges of $K_{n}$ contains either a…

组合数学 · 数学 2021-06-22 Zhao Wang , Yaping Mao , Colton Magnant , Ingo Sciermeyer , Jinyu Zou

A Gallai coloring is a coloring of the edges of a complete graph without rainbow triangles, and a Gallai $k$-coloring is a Gallai coloring that uses at most $k$ colors. For an integer $k\geq 1$, the Gallai-Ramsey number $GR_k(H)$ of a given…

组合数学 · 数学 2020-09-17 Fangfang Zhang , Zi-Xia Song , Yaojun Chen

A Gallai coloring is a coloring of the edges of a complete graph without rainbow triangles, and a Gallai $k$-coloring is a Gallai coloring that uses $k$ colors. Given an integer $k\ge1$ and graphs $H_1, \ldots, H_k$, the Gallai-Ramsey…

组合数学 · 数学 2018-08-31 Hui Lei , Yongtang Shi , Zi-Xia Song , Jingmei Zhang

A Gallai $k$-coloring is a $k$-edge coloring of a complete graph in which there are no rainbow triangles. For given graphs $G_1, G_2, G_3$ and nonnegative integers $r, s, t$ with that $k=r+s+t$, the $k$-colored Gallai-Ramsey number…

组合数学 · 数学 2020-08-28 Xueli Su , Yan Liu

Given two graphs $G$ and $H$, the \emph{general $k$-colored Gallai-Ramsey number} $\operatorname{gr}_k(G:H)$ is defined to be the minimum integer $m$ such that every $k$-coloring of the complete graph on $m$ vertices contains either a…

组合数学 · 数学 2023-02-22 Yaping Mao

A colored complete graph is said to be Gallai-colored if it contains no rainbow triangle. This property has been shown to be equivalent to the existence of a partition of the vertices (of every induced subgraph) in which at most two colors…

组合数学 · 数学 2019-05-29 Colton Magnant , Zhuojun Magnant

For a graph $H$ and an integer $k\ge1$, the $k$-color Ramsey number $R_k(H)$ is the least integer $N$ such that every $k$-coloring of the edges of the complete graph $K_N$ contains a monochromatic copy of $H$. Let $C_m$ denote the cycle on…

组合数学 · 数学 2020-09-18 Fangfang Zhang , Zi-Xia Song , Yaojun Chen

Given a $k$-uniform hypergraph $G$ and a set of $k$-uniform hypergraphs $\mathcal{H}$, the generalized Ramsey number $f(G,\mathcal{H},q)$ is the minimum number of colors needed to edge-color $G$ so that every copy of every hypergraph $H\in…

组合数学 · 数学 2024-06-06 Deepak Bal , Patrick Bennett , Emily Heath , Shira Zerbib

A Gallai $k$-coloring is a $k$-edge coloring of a complete graph in which there are no rainbow triangles. For two given graphs $H, G$ and two positive integers $k,s$ with that $s\leq k$, the $k$-colored Gallai-Ramsey number $gr_{k}(K_{3}:…

组合数学 · 数学 2020-07-07 Xueli Su , Yan Liu

Given a nonempty graph $G$, a collection of nonempty graphs $\cal{H}$, and a positive integer $k$, the Gallai-Ramsey number $\mathrm{gr}_k(G:\mathcal{H})$ is defined to be the minimum positive integer $n$ such that every exact…

组合数学 · 数学 2026-01-21 Zhao Wang , Lanyanni Zhang , Meiqin Wei , Mark Budden
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