Some sufficient conditions for strongly starlikeness
Milutin Obradović1and Shigeyoshi Owa2
Received22 Nov 1999
Abstract
We consider strongly starlikeness of order α of functions
f(z)=z+an+1zn+1+⋯ which are analytic in the unit
disc and satisfy the condition of the form
|f′(z)(zf(z))1+μ−1|<λ,0<μ<1,0<λ<1.