On Pósa's Conjecture for Random Graphs

On Pósa's Conjecture for Random Graphs
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关于Pósa的随机图猜想

DOI:
10.1137/120871729
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发表时间:
2012
期刊:
SIAM J. Discret. Math.
影响因子:
--
通讯作者:
Deryk Osthus
Deryk Osthus
中科院分区:
--
文献类型:
--
作者:
D. Kühn;Deryk Osthus

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著名的Posa猜想指出,每个最小度至少为2n/3的图都包含一个汉密尔顿圈的平方。这已经被证明了大$n$由Komlos,萨科齐,和Szemeredi。本文证明了:若p \gem ^{-1/2+\varepad}$,则二项随机图G_{n,p}$渐近几乎必然包含一个汉密尔顿圈的平方.这为属性提供了一个“近似阈值”,在这个意义上,如果$p\le n^{-1/2}$,结果将不成立。
The famous Posa conjecture states that every graph of minimum degree at least $2n/3$ contains the square of a Hamilton cycle. This has been proved for large $n$ by Komlos, Sarkozy, and Szemeredi. Here we prove that if $p \ge n^{-1/2+\varepsilon}$, then asymptotically almost surely, the binomial random graph $G_{n,p}$ contains the square of a Hamilton cycle. This provides an “approximate threshold” for the property in the sense that the result fails to hold if $p\le n^{-1/2}$.
DOI: 10.1007/s00493-009-2254-3
发表时间: 2006-03
期刊: Combinatorica
影响因子: 1.1
作者:
D. Kühn;Deryk Osthus
通讯作者: D. Kühn;Deryk Osthus