$\pmb{A}$-Statistical extension of the Korovkin type approximation   theorem
  In this paper, using the concept of $A$-statistical convergence which is a regular (non-matrix) summability method, we obtain a general Korovkin type approximation theorem which concerns the problem of approximating a function $f$ by means of a sequence $\{L_{n}f\}$ of positive linear operators. 
Esra Erkus and Oktay Duman