SHARP ENTRYWISE PERTURBATION BOUNDS FOR MARKOV CHAINS.

SHARP ENTRYWISE PERTURBATION BOUNDS FOR MARKOV CHAINS.
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马尔可夫链的急剧进入扰动界限。

DOI:
10.1137/140987900
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发表时间:
2015
期刊:
SIAM journal on matrix analysis and applications : a publication of the Society for Industrial and Applied Mathematics
影响因子:
--
通讯作者:
Weare,Jonathan
Weare,Jonathan
中科院分区:
--
文献类型:
--
作者:
Thiede,Erik;VANKoten,Brian;Weare,Jonathan

文献摘要

参考文献

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对于许多有实际意义的马尔可夫链,其不变分布对转移矩阵中某些项的扰动极为敏感,而对其他项不敏感;我们给出这样一个链的例子,是由计算统计物理中的一个问题激发的。我们推导出了不变量分布的相对误差的摄动界,揭示了这些灵敏度的变化。我们的边界是清晰的,我们没有对转移矩阵或扰动施加任何结构假设,并且计算边界与计算不变分布或计算文献中的其他边界具有相同的复杂性。此外,我们的边界在撞击时间方面有一个简单的解释,它可以用来得出关于链对各种类型扰动的敏感性的直观但严格的结论。
For many Markov chains of practical interest, the invariant distribution is extremely sensitive to perturbations of some entries of the transition matrix, but insensitive to others; we give an example of such a chain, motivated by a problem in computational statistical physics. We have derived perturbation bounds on the relative error of the invariant distribution that reveal these variations in sensitivity. Our bounds are sharp, we do not impose any structural assumptions on the transition matrix or on the perturbation, and computing the bounds has the same complexity as computing the invariant distribution or computing other bounds in the literature. Moreover, our bounds have a simple interpretation in terms of hitting times, which can be used to draw intuitive but rigorous conclusions about the sensitivity of a chain to various types of perturbations.
DOI: 10.1037//0096-1523.1.3.214
发表时间: 1975-08
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影响因子: --
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