Notes on the norm of pre-Schwarzian derivatives of certain analytic functions
DOI:
https://doi.org/10.24193/subbmath.2020.3.04Keywords:
Analytic, univalent, locally univalent, subordination, pre-Schwarzian norm.Abstract
In this paper, we obtain sharp bounds for the norm of pre-Schwarzian derivatives of certain analytic functions. Initially this problem was handled by H. Rahmatan, Sh. Najafzadeh and A. Ebadian [Stud. Univ. Babe¸s-Bolyai Math. 61(2016), no. 2, 155-162]. We pointed out that their proofs are incorrect and present correct proofs.
Mathematics Subject Classification (2010): 30C45.
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Rahmatan, H., Najafzadeh, Sh., Ebadian, A., The norm of pre-Schwarzian derivatives of certain analytic functions with bounded positive real part, Stud. Univ. Babe¸s-Bolyai Math., 61(2016), no. 2, 155-162.
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