An Isoperimetric Result on High-Dimensional Spheres

An Isoperimetric Result on High-Dimensional Spheres
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高维球体的等周结果

DOI:
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发表时间:
2018
期刊:
arXiv.org
影响因子:
--
通讯作者:
Xiugang Wu
Xiugang Wu
中科院分区:
--
文献类型:
--
作者:
L. P. Barnes;Ayfer Özgür;Xiugang Wu

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我们考虑了一个高维球子集的极值问题,它可以被认为是经典等周问题在球上的推广。设$A$是$(m-1)$维球面$mathbb{S}^{m-1}$的子集,设mathbb{S}^{m-1}$中的$mathbf{y}是球面上随机选择的一个点。点$mathbf{y}$的$t$邻域与子集$A$的交集是多少?我们表明,如果$A$是相同尺寸的球形帽,那么这个交叉点很有可能与高概率出现的交叉点差不多大。
We consider an extremal problem for subsets of high-dimensional spheres that can be thought of as an extension of the classical isoperimetric problem on the sphere. Let $A$ be a subset of the $(m-1)$-dimensional sphere $mathbb{S}^{m-1}$, and let $mathbf{y}in mathbb{S}^{m-1}$ be a randomly chosen point on the sphere. What is the measure of the intersection of the $t$-neighborhood of the point $mathbf{y}$ with the subset $A$? We show that with high probability this intersection is approximately as large as the intersection that would occur with high probability if $A$ were a spherical cap of the same measure.
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DOI: 10.1109/tit.2018.2876892
发表时间: 2019
影响因子: 2.5
作者:
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影响因子: --
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