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arXiv 1601.02252math.MG
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各向同性对数凹随机向量凸包的渐近形状

Asymptotic shape of the convex hull of isotropic log-concave random vectors

Apostolos Giannopoulos, Labrini Hioni, Antonis Tsolomitis

摘要:

设$x_1,\ldots ,x_N$是${\mathbb R}^n$上的独立随机点,其分布服从各向同性对数凹测度$μ$,考虑随机多面体$$K_N:={\rm conv}\{ \pm x_1,\ldots ,\pm x_N\}.$$,我们给出了$K_N$在$cn\ls N\ls\exp (n)$范围内的quermaßintegral和其它几何参数的精确估计,这些结果补充了以前在$cn\ls N\ls\exp (\sqrt{n})$范围内给出的\cite{DGT1}和\cite{DGT}的结果.我们工作中的一个基本的新成分是E.~ Milman,它确定所有$1\ls q\ls n$的$μ$的质心体$Z_q(μ)$的平均宽度。

英文摘要:

Let $x_1,\ldots ,x_N$ be independent random points distributed according to an isotropic log-concave measure $μ$ on ${\mathbb R}^n$, and consider the random polytope $$K_N:={\rm conv}\{ \pm x_1,\ldots ,\pm x_N\}.$$ We provide sharp estimates for the quermaßintegrals and other geometric parameters of $K_N$ in the range $cn\ls N\ls\exp (n)$; these complement previous results from \cite{DGT1} and \cite{DGT} that were given for the range $cn\ls N\ls\exp (\sqrt{n})$. One of the basic new ingredients in our work is a recent result of E.~Milman that determines the mean width of the centroid body $Z_q(μ)$ of $μ$ for all $1\ls q\ls n$.

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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