Some Korovkin type approximation applications of power series methods


Uluçay H., ÜNVER M., Söylemez D.

Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales - Serie A: Matematicas, vol.117, no.1, 2023 (SCI-Expanded) identifier

Abstract

© 2022, The Author(s) under exclusive licence to The Royal Academy of Sciences, Madrid.Korovkin type approximation via summability methods is one of the recent interests of the mathematical analysis. In this paper, we prove some Korovkin type approximation theorems in Lq[ a, b] , the space of all measurable real valued qth power Lebesgue integrable functions defined on [a, b] for q≥ 1 , and C[a, b], the space of all continuous real valued functions defined on [a, b], via statistical convergence with respect to power series (summability) methods, integral summability methods and μ-statistical convergence of the power series transforms of positive linear operators. We also show with examples that the results obtained in the present paper are stronger than some existing approximation theorems in the literature.