Some extremal problems on classes of functions determined by linear differential operators

Nguyên Thị Thiêu Hoa

Sbornik. Mathematics, Tome 68 (1991) no. 1, pp. 213-255

Résumé

This article takes up the problems of best quadrature formulas, optimal recovery methods, and widths. Some classical inequalities for derivatives on classes of functions determined by differential polynomials with real coefficients are generalized. Bibliography: 41 titles.

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