Bivariate-Schurer-Stancu Operators Based on (p, q)-Integers

Nadeem Rao, Abdul Wafi


The aim of this article is to introduce a bivariate extension of Schurer-
Stancu operators based on (p; q)-integers. We prove uniform approximation by
means of Bohman-Korovkin type theorem, rate of convergence using total mod-
ulus of smoothness and degree of approximation using second order modulus of
smoothness, Peetre's K-functional, Lipschitz type class.

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