Direkte und inverse Sätze vom Jacksonschen Typ in \(L_p\)-Räumen, \(0<p<1\). (Russian) Zbl 0314.41004
MSC:
41A10 | Approximation by polynomials |
41A65 | Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) |
42A10 | Trigonometric approximation |
41A50 | Best approximation, Chebyshev systems |
42C05 | Orthogonal functions and polynomials, general theory of nontrigonometric harmonic analysis |