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arXiv 1707.01604math.PR
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对称群上转置行走的随机(n-k)-圈

The random (n-k)-cycle to transpositions walk on the symmetric group

Alperen Y. Özdemir

摘要:

我们研究了$S_n$上的马尔可夫链收敛速率,它从一个固定的$k \geq 1$的随机$(n-k)$ -循环开始,然后是随机换位。结果证明,向平稳分布的收敛具有$n$阶。我们证明了在对$c>0$进行$cn + \frac{\ln k}{2}n$步之后,马尔可夫链的规律接近于均匀分布。定义表示的特征被用作测试函数,以获得全变差距离的下界。我们确定的渐近分布的测试功能的马尔可夫链的法律$(n-1)$循环的情况下。上界依赖于对归一化字符的差异的估计。

英文摘要:

We study the rate of convergence of the Markov chain on $S_n$ which starts with a random $(n-k)$-cycle for a fixed $k \geq 1$, followed by random transpositions. The convergence to the stationary distribution turns out to be of order $n$. We show that after $cn + \frac{\ln k}{2}n$ steps for $c>0$, the law of the Markov chain is close to the uniform distribution. The character of the defining representation is used as test function to obtain a lower bound for the total variation distance. We identify the asymptotic distribution of the test function given the law of the Markov chain for the $(n-1)$-cycle case. The upper bound relies on estimates for the difference of normalized characters.

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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