Small ball probability estimates for log-concave measures

Small ball probability estimates for log-concave measures
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对数凹度量的小球概率估计

DOI:
10.1090/s0002-9947-2011-05411-5
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发表时间:
2012
影响因子:
1.3
通讯作者:
G. Paouris
G. Paouris
中科院分区:
数学1区
文献类型:
--
作者:
G. Paouris

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我们建立了各向同性对数符合概率度量的小球概率不等式:存在绝对常数C1,C2> 0,因此,如果x是r频率为b的各向同性log-conconcove随机矢量,则在R中均受B的限制,并且如果a为非一个非元素-Zero n×n矩阵,然后在每个e∈(0,c1)和y∈R中,p('ax -ax -y” 2 6 e“” a'hs)6 e(c2 b'a'a'' )2,其中C1,C2> 0为绝对常数。
We establish a small ball probability inequality for isotropic log-concave probability measures: there exist absolute constants c1, c2 > 0 such that if X is an isotropic log-concave random vector in R with ψ2 constant bounded by b and if A is a non-zero n × n matrix, then for every e ∈ (0, c1) and y ∈ R, P (‖Ax− y‖2 6 e‖A‖HS) 6 e ( c2 b ‖A‖HS ‖A‖op )2 , where c1, c2 > 0 are absolute constants.