scientific article; zbMATH DE number 3493285
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Publication:4076269
zbMath0315.41037MaRDI QIDQ4076269
Publication date: 1975
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Best approximation, Chebyshev systems (41A50) Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) (41A65) Approximation by operators (in particular, by integral operators) (41A35)
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Approximation of invariant operators ⋮ Uniform regularization of the problem of calculating the values of an operator ⋮ Best linear and nonlinear approximations for smooth functions ⋮ Approximation of the differentiation operator by linear bounded operators on the class of twice differentiable functions in the space \(L_2(0,\infty)\) ⋮ Best one-sided approximation of certain classes of functions ⋮ Ramifications of Landau's inequality ⋮ Best approximation of unbounded by bounded operators, and allied problems ⋮ The best approximation to a class of functions of several variables by another class and related extremum problems
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