A coupling approach to Doob’s theorem

A coupling approach to Doob’s theorem
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Doob 定理的耦合方法

DOI:
10.4171/rlm/694
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发表时间:
2014
影响因子:
0.5
通讯作者:
M. Scheutzow
M. Scheutzow
中科院分区:
数学4区
文献类型:
--
作者:
A. Kulik;M. Scheutzow

文献摘要

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我们提供了一个耦合的证明Doob的定理说,一个经常马尔可夫过程的转移概率具有不变的概率测度$\mu$收敛到$\mu$的总变化距离。此外,我们表明,非奇异性(而不是等价)的转移概率足以确保收敛的转移概率为$\mu$-几乎所有的初始条件。
We provide a coupling proof of Doob's theorem which says that the transition probabilities of a regular Markov process which has an invariant probability measure $\mu$ converge to $\mu$ in the total variation distance. In addition we show that non-singularity (rather than equivalence) of the transition probabilities suffices to ensure convergence of the transition probabilities for $\mu$-almost all initial conditions.