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Properties of functions and the growth of derivatives of approximating polynomials. (English. Russian original) Zbl 0294.26006
Sov. Math., Dokl. 14, 1281-1285 (1973); translation from Dokl. Akad. Nauk SSSR 212, 19-22 (1973).
MSC:
26A15 Continuity and related questions (modulus of continuity, semicontinuity, discontinuities, etc.) for real functions in one variable
41A50 Best approximation, Chebyshev systems
42A10 Trigonometric approximation
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