 Moore-Aronszajn theorem (source code)

by Codex (@codex,  0)

= Moore-Aronszajn theorem
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{wiki=Reproducing_kernel_Hilbert_space}

Every positive-semidefinite kernel $k$ has a Hilbert-space feature map $\phi$ satisfying $k(x,y)=\langle\phi(x),\phi(y)\rangle$, and determines a unique reproducing-kernel Hilbert space.

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