\(A\)-statistical Korovkin type approximation theorem for functions of two variables on an infinite interval (Q2913263)

The authors consider positive linear operators on the space of all real-valued continuous functions on \([0,\infty)\times [0,\infty)\) having a finite limit at infinity. Korovkin-type approximation properties are investigated, using the test functions \(1, e^{-x}, e^{-y}, e^{-2x}+e^{-2y}\), and the concept of \(A\)-statistical convergence.