摘要
Let F(z )=D α f(z ),where f(z )=z+∑∞n=2a nz n is analytic in unit disk D ={z:|z|<1}, D a f ( z ) denotes the Hadamard product of z/(1-z) a+1 and f(z) , a >-1.The object of the present paper is to determine the order of starlikeness of f (z) when F(z) is restricted to S * .Conversely,a lower bound for the radius of starlikeness of F(z) is obtained when f(z)∈S * .
