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Extensions of coefficient estimates for new classes of bi-univalent functions defined by Sǎlǎgean integro-differential operator

  • Ágnes Orsolya Páll-Szabó ORCID logo EMAIL logo
Published/Copyright: December 18, 2020

Abstract

In this paper, we introduce and investigate three new general classes of bi-starlike and bi-convex functions of Ma–Minda type defined by the Sǎlǎgean integro-differential operator. Bounds of the first three coefficients |a2|, |a3| and |a4| are given.

MSC 2010: 30C45; 30C50

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Received: 2018-08-06
Accepted: 2020-07-28
Published Online: 2020-12-18
Published in Print: 2021-06-01

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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