本文讨论所有满足,Rc D~(n+1)f(Z)/D~n f(Z)〉a,0≤a＜1,n为自然数或零的函数全体。此处算子D的定义是D~0 f(Z)=f(z),D~1 f(z)=zf(z)......

In this paper, using Salagean differential operator, we define and investigate a new subclass of univalent functions . W......

Let S denote the class of functions that are analytic, normalized and univalent in the open unit disk E = {z: |z| S* and......