The norm of pre-Schwarzian derivatives on bi-univalent functions of order α

Author(s):

H. Rahmatan , Sh. Najafzadeh * , A. Ebadian

Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
ýIn the present investigationý, ýwe give the best estimates for the norm of the pre-Schwarzian derivative Tf(z)=f′′(z)f′(z) for bi-starlike functions and a new subclass of bi-univalent functions of order αý, ýwhereý ý∥Tf∥=sup|z|
Keywords:

Bi-Univalent Functions , bi-starlike functions , subordina- tion , pre-Schwarzian derivatives

Language:
English
Published:
Bulletin of Iranian Mathematical Society, Volume:43 Issue: 5, 2017
Pages:
1037 to 1043
https://www.magiran.com/p1776238