Inverse theorems on approximation of periodic functions

  • O. I. Stepanets

Abstract

We obtain new inverse theorems on the approximation of periodic functions $f(·)$ that establish conditions for the existence of their $(ψ, β)$-derivatives. These theorems also guarantee a certain smoothness of these derivatives.
Published
25.09.1995
How to Cite
StepanetsO. I. “Inverse Theorems on Approximation of Periodic Functions”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 47, no. 9, Sept. 1995, pp. 1266–1273, https://umj.imath.kiev.ua/index.php/umj/article/view/5527.
Section
Research articles