* Correspondence: [email protected] School of Applied Sciences, Netaji Subhas Institute of Technology, Sector 3 Dwarka, New Delhi110078, India Full list of author information is available at the end of the article Abstract Recently, Gupta and Wang introduced certain q-Durrmeyer type operators of real variable x Î [0, 1] and studied some approximation results in the case of real variabl...

We propose a new method, called the textit{the weighted space method}, for the study of the generalized Hyers-Ulam-Rassias stability. We use this method for a nonlinear functional equation, for Volterra and Fredholm integral operators.