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arXiv 1604.02702math.STstat.TH
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识别希尔伯特时间序列的谱表示

Identifying the Spectral Representation of Hilbertian Time Series

Eduardo Horta, Flavio Ziegelmann

摘要:

我们提供平方根n一致性结果估计的协方差算子的希尔伯特时间序列的谱表示,在设置与不完善的测量。这是Bathia等人(2010)开发的方法的推广。推广依赖于可分希尔伯特空间中的中心随机元的一个重要性质,即它们几乎必然位于相关协方差算子的闭线性跨度中。我们提供了一个简单的证明这一事实。据我们所知,这一结果在文献中被忽视了。附带地给出了希尔伯特空间中PCA的严格公式。

英文摘要:

We provide square-root n consistency results regarding estimation of the spectral representation of covariance operators of Hilbertian time series, in a setting with imperfect measurements. This is a generalization of the method developed in Bathia et al. (2010). The generalization relies on an important property of centered random elements in a separable Hilbert space, namely, that they lie almost surely in the closed linear span of the associated covariance operator. We provide a straightforward proof to this fact. This result is, to our knowledge, overlooked in the literature. It incidentally gives a rigorous formulation of PCA in Hilbert spaces.

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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