2 citations · 4 across the 2 of their papers we have counts for
2 papers
math.CA2012★ 2 cited
Uniform approximation of periodical functions by trigonometric sums of a special type
A. S. Serdyuk, Ie. Yu. Ovsii
The approximation properties of the trigonometric sums U_{n,p}^ψof a special type are investigated on the classes C^ψ_{β, \infty} of (ψ,β)-differentiable (in the sense of Stepanets…
math.CA2012★ 2 cited
Approximation of continuous periodic functions by de la Vallee Poussin sums
Ie. Yu. Ovsii, A. S. Serdyuk
We obtain an estimate of the deviation of de la Vallee Poussin sums V_{n,n/2}(f;x) from continuous functions f, expressed in terms of values of theirs modulus of continuity. It is…