Kwapień, S. Isomorphic characterizations of inner product spaces by orthogonal series with vector valued coefficients. (English) Zbl 0256.46024 Stud. Math. 44, 583-595 (1972). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 10 ReviewsCited in 103 Documents MSC: 46C05 Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product) 46B03 Isomorphic theory (including renorming) of Banach spaces 46B15 Summability and bases; functional analytic aspects of frames in Banach and Hilbert spaces PDF BibTeX XML Cite \textit{S. Kwapień}, Stud. Math. 44, 583--595 (1972; Zbl 0256.46024) Full Text: DOI EuDML OpenURL