scientific article

zbMath0588.46019MaRDI QIDQ3715642

Pekka Sorjonen

Publication date: 1984

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

direct sum decompositioncharacterizations of Hilbert spacesPontrjagin spacelattice-theoretic characterizations of Pontrjagin or Krein spacesorthoclosedness

Mathematics Subject Classification ID

Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product) (46C05) Spaces with indefinite inner product (Kre?n spaces, Pontryagin spaces, etc.) (46C20) Complemented lattices, orthocomplemented lattices and posets (06C15)

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