Reproducing kernel Hilbert spaces and Mercer theorem
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We characterize the reproducing kernel Hilbert spaces whose elements are $p$-integrable functions in terms of the boundedness of the integral operator whose kernel is the reproducing kernel. Moreover, for $p=2$ we show that the spectral decomposition of this integral operator gives a complete description of the reproducing kernel.
30 pages, Latex2e
30 pages, Latex2e