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Sharp inequalities for best approximation by splines. (English. Russian original) Zbl 0416.41018
Sov. Math., Dokl. 19, 1092-1095 (1978); translation from Dokl. Akad. Nauk SSSR 242, 280-283 (1978).
MSC:
41A15 Spline approximation
41A50 Best approximation, Chebyshev systems
41A10 Approximation by polynomials
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