在三重体系中有许多颜色的团

IF 0.4 Q4 MATHEMATICS, APPLIED Journal of Combinatorics Pub Date : 2020-05-06 DOI:10.4310/joc.2021.v12.n4.a2
D. Mubayi, Andrew Suk
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引用次数: 2

摘要

Erdős和Hajnal构造了一个$N$ -element集合的三元组的四着色,使得每个$n$ -element子集包含2个具有不同颜色的三元组,并且$N$是$n$的双指数。Conlon, Fox和Rodl问是否存在一个整数$q\ge 3$和一个$q$ -着色的$N$ -元素集合的三元组,使得每个$n$ -元素子集有3个不同颜色的三元组,并且$N$是$n$的双指数。我们通过对所有$q\geq 9$提供具有此性质的$q$ -着色,在这个问题上取得了第一个重要进展,其中$N$是$n^{2+cq}$的指数,$c>0$是绝对常数。
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Cliques with many colors in triple systems
Erdős and Hajnal constructed a 4-coloring of the triples of an $N$-element set such that every $n$-element subset contains 2 triples with distinct colors, and $N$ is double exponential in $n$. Conlon, Fox and Rodl asked whether there is some integer $q\ge 3$ and a $q$-coloring of the triples of an $N$-element set such that every $n$-element subset has 3 triples with distinct colors, and $N$ is double exponential in $n$. We make the first nontrivial progress on this problem by providing a $q$-coloring with this property for all $q\geq 9$, where $N$ is exponential in $n^{2+cq}$ and $c>0$ is an absolute constant.
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来源期刊
Journal of Combinatorics
Journal of Combinatorics MATHEMATICS, APPLIED-
自引率
0.00%
发文量
21
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