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(p,q)-gamma operators which preserve x(2)

Author:
Cheng, Wen-Tao  Zhang, Wen-Hui  Cai, Qing-Bo  


Journal:
JOURNAL OF INEQUALITIES AND APPLICATIONS


Issue Date:
2019


Abstract(summary):

In this paper, we introduce (p,q)-gamma operators which preserve x2, we estimate the moments of these operators, and establish direct and local approximation theorems of these operators. Then two approximation theorems about Lipschitz functions are obtained. The estimates on the rate of convergence and some weighted approximation theorems of the operators are also obtained. Furthermore, the Voronovskaja-type asymptotic formula is also presented.


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