| 46-XX |
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Functional analysis {For manifolds modeled on topological linear spaces, see 57Nxx, 58Bxx} |
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46Cxx |
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Inner product spaces and their generalizations, Hilbert spaces {For function spaces, see 46Exx} |
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46C05 |
Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product) |
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46C07 |
Hilbert subspaces (= operator ranges); complementation (Aronszajn, de Branges, etc.) [See also 46B70, 46M35] |
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46C15 |
Characterizations of Hilbert spaces |
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46C20 |
Spaces with indefinite inner product (Kreĭn spaces, Pontryagin spaces, etc.) [See also 47B50] |
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46C50 |
Generalizations of inner products (semi-inner products, partial inner products, etc.) |
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46C99 |
None of the above, but in this section |
