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Approximative properties of sets in Hilbert space

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Translated from Matematicheskie Zametki, Vol. 31, No. 5, pp. 785–800, May, 1982.

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Balaganskii, V.S. Approximative properties of sets in Hilbert space. Mathematical Notes of the Academy of Sciences of the USSR 31, 397–404 (1982). https://doi.org/10.1007/BF01145720

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