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Estimates of initial coefficients for certain subclasses of bi-univalent functions involving quasi-subordination
Journal article   Open access

Estimates of initial coefficients for certain subclasses of bi-univalent functions involving quasi-subordination

Obaid Algahtani
The journal of nonlinear sciences and its applications, Vol.10(3), pp.1004-1011
06/03/2017
DOI: https://doi.org/10.22436/jnsa.010.03.12

Abstract

Mathematics Mathematics, Applied Physical Sciences Science & Technology
The object of the present paper is to introduce and investigate new subclasses of the function class Sigma of bi-univalent functions defined in the open unit disk U, involving quasi subordination. The coefficients estimate vertical bar a(2)vertical bar and vertical bar a(3)vertical bar for functions in these new subclasses are also obtained. (C)2017 All rights reserved.
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https://doi.org/10.22436/jnsa.010.03.12View
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