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arXiv 1906.04877math.PR
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有限马尔可夫链的解析几何方法及其在拟平稳性中的应用

Analytic-geometric methods for finite Markov chains with applications to quasi-stationarity

Persi Diaconis, Kelsey Houston-Edwards, Laurent Saloff-Coste

摘要:

对于一类相对较大的行为良好的吸收(或杀死)有限马尔可夫链,我们给出了详细的定量估计链的行为之前,它被吸收(或杀死)。典型的例子是在正方形格点$\mathbb Z^d$的盒状有限子集上的随机游动,这些有限子集在边界处被吸收(或杀死)。分析是基于庞加莱,纳什和Harnack不等式,适度增长,约翰和内部一致域的概念。

英文摘要:

For a relatively large class of well-behaved absorbing (or killed) finite Markov chains, we give detailed quantitative estimates regarding the behavior of the chain before it is absorbed (or killed). Typical examples are random walks on box-like finite subsets of the square lattice $\mathbb Z^d$ absorbed (or killed) at the boundary. The analysis is based on Poincaré, Nash, and Harnack inequalities, moderate growth, and on the notions of John and inner-uniform domains.

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