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arXiv 2103.03169math.PRmath.FAmath.STstat.MLstat.TH
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高斯过程的小样本空间

Small Sample Spaces for Gaussian Processes

Toni Karvonen

摘要:

已知高斯过程$X$的样本在给定的再生核希尔伯特空间(RKHS)中的隶属度受一定的核优势条件控制。然而,如何识别包含样本的“小”函数集(不一定是向量空间)还不太清楚。本文提出了一个一般的方法来确定这样的集合。我们使用缩放的RKHS,这可以被看作是一个广义的希尔伯特尺度,定义的样本支撑集是最大的集,这是包含在每一个元素的满测度下的$X$的法律下,在$σ$ -代数引起的缩放的RKHS的集合。这个潜在的不可可测集,然后被证明是由这些功能,可以展开的一个规范正交基的RKHS的协方差内核的$X$,并有他们的平方基系数有界远离零和无穷大,一个结果建议的Karhunen-Loève定理。

英文摘要:

It is known that the membership in a given reproducing kernel Hilbert space (RKHS) of the samples of a Gaussian process $X$ is controlled by a certain nuclear dominance condition. However, it is less clear how to identify a "small" set of functions (not necessarily a vector space) that contains the samples. This article presents a general approach for identifying such sets. We use scaled RKHSs, which can be viewed as a generalisation of Hilbert scales, to define the sample support set as the largest set which is contained in every element of full measure under the law of $X$ in the $σ$-algebra induced by the collection of scaled RKHS. This potentially non-measurable set is then shown to consist of those functions that can be expanded in terms of an orthonormal basis of the RKHS of the covariance kernel of $X$ and have their squared basis coefficients bounded away from zero and infinity, a result suggested by the Karhunen-Loève theorem.

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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