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arXiv 2008.10979math.STstat.TH
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概率密度范数的Minimax估计:I.下界

Minimax estimation of norms of a probability density: I. Lower bounds

Alexander Goldenshluger, Oleg Lepski

摘要:

本文讨论了独立观测值的概率密度$d\geq 1$的$L_p$-范数$p\in (1,\infty)$的非参数估计问题。假设待估计的未知密度%属于各向异性Nikolskii空间中的球。我们采用极大极小方法,并推导出极大极小风险的下界。特别是,我们证明了估计程序的准确性基本上取决于$p$是否是整数或没有。此外,我们开发了一个通用的技术推导的下界的极小极大风险估计的非线性泛函的问题。所提出的方法适用于广泛的一类非线性泛函,并用于推导~ $L_p$ -范数估计的下界。

英文摘要:

The paper deals with the problem of nonparametric estimating the $L_p$--norm, $p\in (1,\infty)$, of a probability density on $R^d$, $d\geq 1$ from independent observations. The unknown density %to be estimated is assumed to belong to a ball in the anisotropic Nikolskii's space. We adopt the minimax approach, and derive lower bounds on the minimax risk. In particular, we demonstrate that accuracy of estimation procedures essentially depends on whether $p$ is integer or not. Moreover, we develop a general technique for derivation of lower bounds on the minimax risk in the problems of estimating nonlinear functionals. The proposed technique is applicable for a broad class of nonlinear functionals, and it is used for derivation of the lower bounds in the~$L_p$--norm estimation.

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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