Schoenberg, I. J. A remark on M. M. Day’s characterization of inner-product spaces and a conjecture of L. M. Blumenthal. (English) Zbl 0049.08301 Proc. Am. Math. Soc. 3, 961-964 (1952). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 39 Documents Keywords:functional analysis PDFBibTeX XMLCite \textit{I. J. Schoenberg}, Proc. Am. Math. Soc. 3, 961--964 (1952; Zbl 0049.08301) Full Text: DOI