Approximation degree of Durrmeyer-Bézier type operators

J Inequal Appl. 2018;2018(1):29. doi: 10.1186/s13660-018-1622-1. Epub 2018 Feb 22.

Abstract

Recently, a mixed hybrid operator, generalizing the well-known Phillips operators and Baskakov-Szász type operators, was introduced. In this paper, we study Bézier variant of these new operators. We investigate the degree of approximation of these operators by means of the Lipschitz class function, the modulus of continuity, and a weighted space. We study a direct approximation theorem by means of the unified Ditzian-Totik modulus of smoothness. Furthermore, the rate of convergence for functions having derivatives of bounded variation is discussed.

Keywords: Baskakov–Szász type operators; Bounded variation; Ditzian–Totik modulus of smoothness; Rate of convergence.