Journal of applied mathematics & informatics
- Volume 16 Issue 1_2
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- Pages.533-537
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- 2004
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- 2734-1194(pISSN)
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- 2234-8417(eISSN)
A CHARACTERIZATION OF HILBERT SPACE BY THE INFIMUM VALUE OF SOME EXPECTATIONS
Abstract
A Banach space X is a Hilbert space if and only if E|x + Y|