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arXiv 2102.12356math.PRcs.DMmath.CO
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转移概率为有理数的(多重)马尔可夫链的覆盖时间是有理数

The Cover Time of a (Multiple) Markov Chain with Rational Transition Probabilities is Rational

John Sylvester

AI总结:

该研究证明了转移概率为有理数的离散时间马尔可夫链有界覆盖时间的有理性,并将结论推广到多独立副本的多重马尔可夫链场景,通过高维链击中时间关联完成证明。

摘要:

有限状态空间上马尔可夫链的覆盖时间是指访问完所有状态所需的期望时间。本文证明,若转移概率为有理数的离散时间马尔可夫链的覆盖时间有界,则它是一个有理数。该结果通过将原链的覆盖时间与另一更高维链中某个集合的击中时间相关联来证明。本文还将这一结果推广到以下场景:在同一状态空间上同时运行$k\geq1$个独立的马尔可夫链副本,此时覆盖时间定义为每个状态至少被一个链副本访问所需的期望时间。

英文摘要:

The cover time of a Markov chain on a finite state space is the expected time until all states are visited. We show that if the cover time of a discrete-time Markov chain with rational transitions probabilities is bounded, then it is a rational number. The result is proved by relating the cover time of the original chain to the hitting time of a set in another higher dimensional chain. We also extend this result to the setting where $k\geq 1 $ independent copies of a Markov chain are run simultaneously on the same state space and the cover time is the expected time until each state has been visited by at least one copy of the chain.

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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