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arXiv 2007.10209math.PRmath.FA
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修正的log-Sobolev不等式、Beckner不等式和矩估计

Modified log-Sobolev inequalities, Beckner inequalities and moment estimates

Radosław Adamczak, Bartłomiej Polaczyk, Michał Strzelecki

摘要:

我们证明了在一般的马尔可夫半群的Beckner不等式的情况下,常数从零分离为$p\to 1^+$是等价于修改的日志Sobolev不等式(以前只有一个含义是已知的,在此一般性)。此外,通过调整的参数Boucheron等人。我们得到Sobolev型矩估计,这些功能的不平等。我们说明了我们的结果与应用程序的浓度的措施估计(也是高阶,超出Lipschitz函数的情况下)的各种随机模型,包括随机排列,零范围的过程,强瑞利措施,指数随机图,几何泛函的泊松道路空间。

英文摘要:

We prove that in the context of general Markov semigroups Beckner inequalities with constants separated from zero as $p\to 1^+$ are equivalent to the modified log Sobolev inequality (previously only one implication was known to hold in this generality). Further, by adapting an argument by Boucheron et al. we derive Sobolev type moment estimates which hold under these functional inequalities. We illustrate our results with applications to concentration of measure estimates (also of higher order, beyond the case of Lipschitz functions) for various stochastic models, including random permutations, zero-range processes, strong Rayleigh measures, exponential random graphs, and geometric functionals on the Poisson path space.

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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