scientific article; zbMATH DE number 3565513
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Publication:4137584
zbMath0363.41028MaRDI QIDQ4137584
Publication date: 1977
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Best approximation, Chebyshev systems (41A50) General theory of ordinary differential operators (47E05) Additive difference equations (39A10) Approximation by operators (in particular, by integral operators) (41A35) Spline approximation (41A15)
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