
doi: 10.1007/bf02417112
The notation of Gramian matrix is generalized to operators between function spaces and then used to provide an operator-valued inner product between pairs of Hilbert space-valued Banach function spaces. In this context projection operators, Schwarz's inequality, and orthonormal series are discussed.
Spaces of vector- and operator-valued functions, Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product), Spaces of measurable functions (\(L^p\)-spaces, Orlicz spaces, Köthe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.)
Spaces of vector- and operator-valued functions, Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product), Spaces of measurable functions (\(L^p\)-spaces, Orlicz spaces, Köthe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.)
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