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arXiv 2006.04840math.PRstat.ME
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随机乱序与Ewens抽样公式

Random derangements and the Ewens Sampling Formula

Poly H. da Silva, Arash Jamshidpey, Simon Tavaré

摘要:

研究了$\{1,2,\ldots,n\}$在参数为$θ$的Ewens分布下的无序性.我们给出了大$n$的周期数、周期数和渐近分布的矩和边缘分布。本文构造了一个$\{0,1\}$值非齐次马尔可夫链,它具有1之间的间距长度的计数服从无序分布的性质.该链是所谓的Feller耦合的模拟物,提供了一种简单的方法来模拟对于给定的$n$的时间上的不依赖于$θ$的紊乱,并且在紊乱的大小上是线性的。

英文摘要:

We study derangements of $\{1,2,\ldots,n\}$ under the Ewens distribution with parameter $θ$. We give the moments and marginal distributions of the cycle counts, the number of cycles, and asymptotic distributions for large $n$. We develop a $\{0,1\}$-valued non-homogeneous Markov chain with the property that the counts of lengths of spacings between the 1s have the derangement distribution. This chain, an analog of the so-called Feller Coupling, provides a simple way to simulate derangements in time independent of $θ$ for a given $n$ and linear in the size of the derangement.

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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