= Arthur Gretton
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Arthur Gretton coauthored an exposition of <Reproducing kernel Hilbert spaces> with <Dino Sejdinovic>. Their notes explain how a <positive-definite kernel> determines a Hilbert space and how <Mercer's theorem> supplies an eigenfunction expansion under compactness assumptions. This makes it possible to represent functions through kernel evaluations or spectral coordinates.<What is an RKHS? by Dino Sejdinovic and Arthur Gretton>[Outline and Section 6.2, Theorem 48]{ref}
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