The Radius of Starlikeness of Certain Analytic Functions

P. L. Bajpai, Prem Singh
1974 Proceedings of the American Mathematical Society  
Let f(z)= %[zF(z)Y, where F(z) is starlike of order a, 05=a<l in D = {z:\z\<\}. The purpose of this paper is to find out the disc in which/(z) is starlike of order ß, 0i=/ï<l. Results are best possible.
doi:10.2307/2040445 fatcat:cufrzjhq45ejtftw5m33knp3ay