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arXiv 1302.1699math.PR
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二次型的锐偏差界

Sharp deviation bounds for quadratic forms

Vladimir Spokoiny

摘要:

本文给出了随机向量\(\xiv\)具有有限指数矩的一般二次型的偏差概率的尖锐不等式。得到的偏差界类似于高斯随机向量的情况。这些结果是在一般条件下给出的,不需要假设矢量\(\xiv\)有任何特殊的结构。得到的界是精确的(非渐近的),所有常数是明确的,界中的首项是尖锐的。

英文摘要:

This note presents sharp inequalities for deviation probability of a general quadratic form of a random vector \(\xiv\) with finite exponential moments. The obtained deviation bounds are similar to the case of a Gaussian random vector. The results are stated under general conditions and do not suppose any special structure of the vector \(\xiv\). The obtained bounds are exact (non-asymptotic), all constants are explicit and the leading terms in the bounds are sharp.

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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