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Authors: RAHIM KARGAR.
DOI: 10.24193/subbmath.2020.3.04
Published Online: 2020-09-15
Published Print: 2020-09-15
pp. 357-363
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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 Babec{s}--Bolyai Math {f61}(2): 155--162, 2016]. We pointed out that their proofs are incorrect and present correct proofs.
Key words: Analytic; Univalent; Locally univalent; Subordination; Pre--Schwarzian norm.
