Partitioning ordered hypergraphs
Partitioning ordered hypergraphs
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划分有序超图
DOI:
10.1016/j.jcta.2020.105300
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Verstraëte, Jacques
中科院分区:
文献类型:
--
作者:
Füredi, Zoltán;Jiang, Tao;Kostochka, Alexandr;Mubayi, Dhruv;Verstraëte, Jacques
An ordered r-graph is an r-uniform hypergraph whose vertex set is linearly ordered. Given 2≤ k≤ r, an ordered r-graph H is interval k-partite if there exist at least k disjoint intervals in the ordering such that every edge of H has nonempty intersection with each of the intervals and is contained in their union. Our main result implies that if α> k− 1, then for each d> 0 every n-vertex ordered r-graph with d n α edges has for some m≤ n an m-vertex interval k-partite subgraph with Ω (d m α) edges. This is an extension to ordered r-graphs of the observation by Erdős and Kleitman that every r-graph contains an r-partite subgraph with a constant proportion of the edges. The restriction α> k− 1 is sharp. We also present applications of the main result to several extremal problems for ordered hypergraphs.
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影响因子:
1.1
作者:
D. Mubayi;Jacques Verstraëte
通讯作者:
Jacques Verstraëte
DOI:
--
发表时间:
2013
期刊:
arXiv.org
影响因子:
--
作者:
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J. Fox
影响因子:
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1.1
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DOI:
10.1016/j.aam.2006.05.002
发表时间:
2005
期刊:
Adv. Appl. Math.
影响因子:
--
作者:
Martin Klazar;A. Marcus
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