S. B. Stechkin

Approximation of functions and operators

Orthogonal series and approximation of functions

Approximation of periodic functions

Approximation of functions by polynomials and splines

Proceedings of an All-Union School on the Theory of Functions (Proceedings of the Steklov Institute of Mathematics)

Izbrannye trudy

Priblizhenie funkt︠s︡iĭ polinomami i splaĭnami

Ortogonalʹnye ri︠a︡dy i priblizhenie funkt︠s︡iĭ

Extremal properties of polynomials

Approximation of functions in the mean

Priblizhenie periodicheskikh funkt︠s︡iĭ

Teorii︠a︡ priblizheniĭ, garmonicheskiĭ analiz

Ekstremalʹnye svoĭstva polinomov

Priblizhenie funkt͡siĭ i operatorov

On absolute convergence of orthogonal series. I.

Approximation theory, harmonic analysis

Splainy v vychislitel'noi matematike

Sequences of convergence for series