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In this paper, which deals essentially with various summability concepts and summability techniques and shows how these concepts and techniques lead to a number of approximation results, we have used the new concept of weighted A -summability proposed by Mohiuddine (2016) and introduced the notions of statistically weighted B -summability and weighted B -statistical convergence with respect to the weighted regular method. We then prove a Korovkin type approximation theorem for functions of two variables and also present an example via generalized Meyer-König and Zeller type operator to show that our proposed method is stronger than its classical and statistical versions. Furthermore, the rate of convergence of approximating positive linear operators are estimated by means of the modulus of continuity and some Voronovskaja type results are investigated. Computational and geometrical approaches to illustrate some of our results are also presented. [ABSTRACT FROM AUTHOR]

In this paper, we propose to introduce a new Λ 2 -weighted statistical convergence. Based upon this definition, we prove some Korovkin type theorems. We also find the rate of the convergence for this kind of weighted statistical convergence and derive some Voronovskaya type theorems. [ABSTRACT FROM AUTHOR]

Abstract: The main object of this paper is to prove a Korovkin type theorem for the test functions 1, in the space of all continuous -periodic functions on the real line . Our analysis is based upon the statistical summability involving the idea of the generalized de la Vallée Poussin mean. We also investigate the rate of the de la Vallée Poussin statistical summability of positive linear operators in the space . Finally, we provide an interesting illustrative example in support of our result. [Copyright &y& Elsevier]