Reproducing kernel Hilbert spaces of Gaussian priors

Details Reproducing kernel Hilbert spaces of Gaussian priors Reproducing kernel Hilbert spaces of Gaussian priors

2008-05-21

arxiv.org/abs/0805.3252v1

IMS Collections 2008, Vol. 3, 200-222

Mathematics

Functional Analysis

Published in at http://dx.doi.org/10.1214/074921708000000156 the IMS Collections (http://www.imstat.org/publications/imscollec

Scientific paper

10.1214/074921708000000156

We review definitions and properties of reproducing kernel Hilbert spaces attached to Gaussian variables and processes, with a view to applications in nonparametric Bayesian statistics using Gaussian priors. The rate of contraction of posterior distributions based on Gaussian priors can be described through a concentration function that is expressed in the reproducing Hilbert space. Absolute continuity of Gaussian measures and concentration inequalities play an important role in understanding and deriving this result. Series expansions of Gaussian variables and transformations of their reproducing kernel Hilbert spaces under linear maps are useful tools to compute the concentration function.

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