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arXiv 1602.02207math.PR
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随机游动最长递增子序列的非普适性

Non-universality for longest increasing subsequence of a random walk

Robin Pemantle, Yuval Peres

摘要:

已知均值为零且方差有限的随机游动的最长递增子序列是$n^{1/2 + o(1)}$。我们表明,这是不普遍的对称随机游动。特别地,对称超胖尾随机游动具有最长递增子序列,其渐近地至少为$n^{0.690}$且至多为$n^{0.815}$。当$α$足够小时,对于对称稳定- $α$分布,还显示出严格大于$1/2$的指数。

英文摘要:

The longest increasing subsequence of a random walk with mean zero and finite variance is known to be $n^{1/2 + o(1)}$. We show that this is not universal for symmetric random walks. In particular, the symmetric Ultra-fat tailed random walk has a longest increasing subsequence that is asymptotically at least $n^{0.690}$ and at most $n^{0.815}$. An exponent strictly greater than $1/2$ is also shown for the symmetric stable-$α$ distribution when $α$ is sufficiently small.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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