Korovkin type approximation theorem for functions of two variables in statistical sense

By Fadime Dirik, Kamil Demirci. Turkish Journal of Mathematics, 2010

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In this paper, using the concept of A-statistical convergence for double sequences, we investigate a Korovkin-type approximation theorem for sequences of positive linear operator on the space of all continuous real valued functions defined on any compact subset of the real two-dimensional space. Then we display an application which shows that our new result is stronger than its classical version. We also obtain a Voronovskaya-type theorem \ and some differential properties for sequences of positive linear operators constructed by means of the Bernstein polynomials of two variables.

Subfields: Numerical Analysis, Statistics and Probability

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