1979/4/1

Approximation in metric linear spaces

Inequalities for fractional derivatives on the half-line

On the uniform continuity of metric projection

Local Lipschitz continuity of the metric projection operator

Equivalence, unconditionality and convergence a.e. of the spline bases in ${\displaystyle L_p}$ spaces

Approximation of double coset spaces

On some applications of Bochner-Schoenberg-Eberlein type theorems

Zur Konstruktion von besten linearen Approximationen in normierten Räumen

Теоремы двойственности и экстремальные задачи наилучшего приближения

On the strong summability and approximation of Fourier series

Operator norm bounds and error bounds for quadratic spline interpolation

The upper bound of the norms of orthogonal projections onto subspaces of polygonal

Quantitative estimates of N.N. Luzin's C-property for classes of integrable functions

Properties of bounded orthonormal spline bases

On a generalization of the martingale maximal theorem

Lower bounds for spline approximation

Comparative approximation in two topologies

A counterexample in harmonic analysis

On Banach spaces in which every M-basis is a generalized summation basis

A relation between Fourier transforms in one and two variables

Indirect approximation theorems in ${\displaystyle L^p}$-metrics ${\displaystyle (1<p<\infty )}$

On unconditional convergence of Haar series

Теория экстремальных задач и теория приближений

A multiplier in Besov spaces which is not a multiplier in Lebesgue spaces

On the dual of weighted ${\displaystyle H^1(\left|z\right|<1)}$

On the application of the orthonormal Franklin system to the approximation of analytic functions