Korovkin type approximation theorem for statistical A-summability of double sequences
In this paper, we prove a Korovkin type approximation theorem for a function of two variables by using the notion of statistical A-summability. We also construct an example by Meyer-Konig and Zeller operators to show that our result is stronger than those of previously proved by other authors.
korovkin type approximation theorem statistical a-summability double sequence density statistical convergence a-statistical convergence positive linear operator