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arXiv 2103.12200math.PRmath.NT
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再论发散Borel-Cantelli引理

The Divergence Borel-Cantelli Lemma revisited

Victor Beresnevich, Sanju Velani

摘要:

设$(Ω, \mathcal{A}, μ)$是一个概率空间。经典的Borel-Cantelli引理指出,对于任何$μ$ -可测集序列$E_i$($i=1,2,3,\dots$),如果它们的测度之和收敛,则相应的$\limsup$集$E_\infty$的测度为零。一般来说,相反的陈述是错误的。然而,众所周知,分歧对应是真实的各种额外的“独立”假设。在本文中,我们重新审视这些假设,并建立充分和必要条件$E_\infty$有积极的或充分的措施。

英文摘要:

Let $(Ω, \mathcal{A}, μ)$ be a probability space. The classical Borel-Cantelli Lemma states that for any sequence of $μ$-measurable sets $E_i$ ($i=1,2,3,\dots$), if the sum of their measures converges then the corresponding $\limsup$ set $E_\infty$ is of measure zero. In general the converse statement is false. However, it is well known that the divergence counterpart is true under various additional 'independence' hypotheses. In this paper we revisit these hypotheses and establish both sufficient and necessary conditions for $E_\infty$ to have either positive or full measure.

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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