Journal of applied mathematics & informatics
- 제17권1_2_3호
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- Pages.567-572
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- 2005
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- 2734-1194(pISSN)
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- 2234-8417(eISSN)
A CHARACTERIZATION OF HILBERT SPACES BY THE SUPREMUM VALUE OF SOME EXPECTATIONS
초록
A Banach space X is a Hilbert space if and only if