Radius problems for a certain class of analytic functions

Abstract

In this paper, we determine the radii of starlikeness and convexity of functions of the class T(_n^α)(β) introduced in [3] by Opoola. It is well known that for n=0, this class consists largely of analytic functions which are not necessarily univalent in the unit disk. For this case n=o, the radius of univalence is indicated by the sufficiency of starlikeness