Gallai–Ramsey Numbers of Odd Cycles and Complete Bipartite Graphs

被引:0
|
作者
Ming Chen
Yusheng Li
Chaoping Pei
机构
[1] Tongji University,School of Mathematical Sciences
[2] Jiaxing University,College of Mathematics Physics and Information Engineering
来源
Graphs and Combinatorics | 2018年 / 34卷
关键词
Gallai–Ramsey number; Rainbow triangle; Cycle; Bipartite graph;
D O I
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学科分类号
摘要
For graphs G and H and integer k≥1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$k\ge 1$$\end{document}, the Gallai–Ramsey number grk(G:H)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$gr_k(G:H)$$\end{document} is defined to be the minimum integer N such that if KN\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$K_N$$\end{document} is edge-colored with k colors, then there is either a rainbow G or a monochromatic H. It is known that grk(K3:C2n+1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$gr_k(K_3:C_{2n+1})$$\end{document} is exponential in k. In this note, we improve the upper bound for grk(K3:C2n+1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$gr_k(K_3:C_{2n+1})$$\end{document} obtained by Hall et al., and give bounds for grk(K3:Km,n)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$gr_k(K_3:K_{m,n})$$\end{document}.
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页码:1185 / 1196
页数:11
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