修正Szász算子加权逼近的逆定理

Inverse theorem for modified Szász operators in weighted approximation

借助于Ditzian Totik光滑模 ,研究了修正Szsz算子的加权逼近问题 ,对于一类函数给出了该算子加权逼近的逆定理 ,推广了已有的一些结果 .

Using Ditzian-Totik modulus,the problems of weighted approximation for modified Szsz operators were discussed,an inverse theorem for these operators for a class of functions in weighted approximation was given,which extended a result of Guo Shunsheng.