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arXiv 1708.05022math.CAmath.DS
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一个一致随机点态遍历定理

A Uniform Random Pointwise Ergodic Theorem

Ben Krause, Pavel Zorin-Kranich

摘要:

设$a_n$是随机递增的自然数序列,其每个值独立地取顺序为$n^{-α}$,$0 < α< 1/2$的递减概率。我们证明,几乎可以肯定的是,对于每一个测量保持系统$(X,T)$和每一个$f \in L^1(X)$正交的不变因子,调制,随机平均值\[ \sup_{b} \Big| \frac{1}{N} \sum_{n = 1}^N b(n) T^{a_{n}} f \Big| \]收敛到$0$逐点几乎处处,其中的上确界是采取了一组有界函数与某些一致逼近属性。

英文摘要:

Let $a_n$ be the random increasing sequence of natural numbers which takes each value independently with decreasing probability of order $n^{-α}$, $0 < α< 1/2$. We prove that, almost surely, for every measure-preserving system $(X,T)$ and every $f \in L^1(X)$ orthogonal to the invariant factor, the modulated, random averages \[ \sup_{b} \Big| \frac{1}{N} \sum_{n = 1}^N b(n) T^{a_{n}} f \Big| \] converge to $0$ pointwise almost everywhere, where the supremum is taken over a set of bounded functions with certain uniform approximation properties.

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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