Direct and inverse theorems on statistical approximations by positive linear operators
The author proves some direct and inverse results on \(A\)-statistical convergence of the sequence of general positive linear operators. The order of \(A\)-statistical convergence is computed by means of the modulus of continuity and Peetre's \(K\)-functionals.
first- and second-order modulus of continuities and Lipschitz classes
scientific article; zbMATH DE number 5541306