On certain implications which characterize Hilbert space
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Publication:2647735
DOI10.2307/1969042zbMath0031.21901OpenAlexW2331807671MaRDI QIDQ2647735
Publication date: 1948
Published in: Annals of Mathematics. Second Series (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.2307/1969042
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