On Erdős–Ko–Rado for Random Hypergraphs II

On Erdős–Ko–Rado for Random Hypergraphs II
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论随机超图 II 的 Erdős–Ko–Rado

DOI:
10.1017/s0963548318000433
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发表时间:
2014
期刊:
Combinatorics, Probability and Computing
影响因子:
--
通讯作者:
J. Kahn
J. Kahn
中科院分区:
--
文献类型:
--
作者:
Arran Hamm;J. Kahn

文献摘要

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用 ${\mathcal H}_k$(n, p) 表示随机 k 图,其中 {1,. 。 .,n} 以概率 p 出现,与其他选择无关。或多或少回答了 Balogh、Bohman 和 Mubayi 的问题,我们表明:存在固定的 ε > 0,这样如果 n = 2k + 1 且 p > 1 - ε,则 w.h.p. (也就是说,当 k → ∞ 时,概率趋向于 1),${\mathcal H}_k$(n, p) 具有“Erdős–Ko–Rado 性质”。我们还提到了斯佩纳定理的类似随机版本。
Denote by ${\mathcal H}_k$(n, p) the random k-graph in which each k-subset of {1,. . .,n} is present with probability p, independent of other choices. More or less answering a question of Balogh, Bohman and Mubayi, we show: there is a fixed ε > 0 such that if n = 2k + 1 and p > 1 - ε, then w.h.p. (that is, with probability tending to 1 as k → ∞), ${\mathcal H}_k$(n, p) has the ‘Erdős–Ko–Rado property’. We also mention a similar random version of Sperner's theorem.