46Cxx Inner product spaces and their generalizations, Hilbert spaces , {For function spaces, See 46Exx} ( 0 Dok. )

• 46C05 Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product) ( 0 Dok. )
• 46C15 Characterizations of Hilbert spaces ( 0 Dok. )
• 46C20 Spaces with indefinite inner product ( 0 Dok. )
• 46C50 Generalizations of inner products (semi-inner products, partial inner products, etc.) ( 0 Dok. )
• 46C99 None of the above but in this section ( 0 Dok. )