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Best uniform approximation of differentiable functions. (English. Russian original) Zbl 0112.29302
Sov. Math., Dokl. 2, 1449-1452 (1961); translation from Dokl. Akad. Nauk SSSR 141, 304-307 (1961).

MSC:
41A50 Best approximation, Chebyshev systems
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