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Transformations of Hilbert space, positive definite functions on a semigroup
B. Szőkefalvi-Nagy
Citation:
B. Szőkefalvi-Nagy, “Transformations of Hilbert space, positive definite functions on a semigroup”, Russian Math. Surveys, 11:6 (1956)
Linking options:
https://www.mathnet.ru/eng/rm7932 https://www.mathnet.ru/eng/rm/v11/i6/p173
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