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arXiv 1212.2015math.PR
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马尔可夫链的浓度不等式的Marton耦合和谱方法

Concentration inequalities for Markov chains by Marton couplings and spectral methods

Daniel Paulin

摘要:

证明了一类常数与混合时间成正比的马尔可夫链的McDiarmid有界差分不等式。我们还证明了马尔可夫链的经验平均的方差界和Bernstein型不等式。在不可逆链的情况下,我们引入了一个新的量称为“伪谱间隙”,并表明它起着类似的作用,不可逆链的谱间隙发挥可逆链。我们的技术证明这些结果的基础上的耦合建设的Katalin马顿,和光谱技术由于帕斯卡Lezaud。伪谱隙推广了Jim Fill的乘法可逆性方法。

英文摘要:

We prove a version of McDiarmid's bounded differences inequality for Markov chains, with constants proportional to the mixing time of the chain. We also show variance bounds and Bernstein-type inequalities for empirical averages of Markov chains. In the case of non-reversible chains, we introduce a new quantity called the "pseudo spectral gap", and show that it plays a similar role for non-reversible chains as the spectral gap plays for reversible chains. Our techniques for proving these results are based on a coupling construction of Katalin Marton, and on spectral techniques due to Pascal Lezaud. The pseudo spectral gap generalises the multiplicative reversiblication approach of Jim Fill.

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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