RADII FOR CERTAIN CLASS DEFINED BY DIFFERENTIAL OPERATOR

Abstract

Use of differential operators in geometric function theory has been become a topic for a lot of
investigation in recent years. These investigations considered to be important because the generalized
many results studied by various research. One of the most beautiful classical problems in geometric
function theory is radius of star likeness and radius of convexity. In this work,
we determined radius of
star likeness and convexity for the class    

, S defined by generalized differential operator   z f RDn
 , .
On the other hand, we used the computer software like (Wolfram Alfa Program– Complex Tool Program)
for graph some special cases.