关于Szasz算子的Woronovskaja－型定理

On The Szasz Operator’s Woronovskaja-type Theorem

设ｆ（ｘ）是［０，＋∞）上的二次连续可微函数，且ｆ（ｘ）＝０（ｘ￣（αｘ））（α＞０．ｘ→∞）．

Let f(x)be a twice continuously differentiable function on[0,∞),f(x)=0(x￣(αx))(α>0,x→∞)S_(np)(f(t),In thispaper, We have obtained