Department of mathematics, Central University of Haryana, Haryana-123031, India.
Department of Mathematics, Manav Rachna University, Faridabad-121004, Haryana, India
We derive the approximation of differences of operators. Firstly, we study quantitative estimates for the difference of generalized Szász operators with generalized Szász-Durrmeyer, Szász-Puãltvänea operators, and generalized Szász--Kantorovich operators. Finally, we obtain the quantitative estimate in terms of the weighted modulus of smoothness for these operators.