arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.01587math.PR
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对数凹随机向量的顺序统计量的双侧估计

Two-sided estimates for order statistics of log-concave random vectors

Rafał Latała, Marta Strzelecka

摘要:

我们建立双边边界的期望值的顺序统计量($k$ -th极大值)的中心对数凹随机向量与不相关的坐标的坐标模。我们的界限是准确的乘法通用常数在无条件的情况下,所有的$k$和各向同性的情况下,$k \leq n-cn^{5/6}$。我们还得到了一些类的随机向量的$k$最大模的坐标的期望和双边估计。

英文摘要:

We establish two-sided bounds for expectations of order statistics ($k$-th maxima) of moduli of coordinates of centered log-concave random vectors with uncorrelated coordinates. Our bounds are exact up to multiplicative universal constants in the unconditional case for all $k$ and in the isotropic case for $k \leq n-cn^{5/6}$. We also derive two-sided estimates for expectations of sums of $k$ largest moduli of coordinates for some classes of random vectors.

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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