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arXiv 0909.2636math.PR
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马尔可夫链的Kemeny常数

The Kemeny constant of a Markov chain

Peter G. Doyle

摘要:

给定一个遍历有限状态马尔可夫链,令M_{iw}表示从i到平衡的平均时间,这意味着从i开始,到达根据链的平衡测度w随机选择的状态的期望时间。John Kemeny观察到M_{iw}不依赖于起点i。公共值K= M_{iw}是Kemeny常数或链的寻道时间。K是一个谱不变量,即预解矩阵的迹。我们回顾了寻找时间的基本事实,并将其与遍历马尔可夫链的公共汽车悖论和中心极限定理联系起来。

英文摘要:

Given an ergodic finite-state Markov chain, let M_{iw} denote the mean time from i to equilibrium, meaning the expected time, starting from i, to arrive at a state selected randomly according to the equilibrium measure w of the chain. John Kemeny observed that M_{iw} does not depend on starting the point i. The common value K=M_{iw} is the Kemeny constant or seek time of the chain. K is a spectral invariant, to wit, the trace of the resolvent matrix. We review basic facts about the seek time, and connect it to the bus paradox and the Central Limit Theorem for ergodic Markov chains.

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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