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Volume 68, Issue 2


Faber polynomial coefficient estimates for subclass of bi-univalent functions defined by quasi-subordinate

Ahmad Zireh / Ebrahim Analouei Adegani / Mahmood Bidkham
Published Online: 2018-03-31 | DOI: https://doi.org/10.1515/ms-2017-0108


In this paper, we use the Faber polynomial expansion to find upper bounds for |an| (n ≥ 3) coefficients of functions belong to classes HqΣ(λ,h),STqΣ(α,h) andMqΣ(α,h) which are defined by quasi-subordinations in the open unit disk 𝕌. Further, we generalize some of the previously published results.

MSC 2010: Primary 30C45; Secondary 30C50

Keywords: Bi-univalent functions; coefficient estimates; Faber polynomial expansion; quasi-subordinate

This work was supported by Shahrood University of Technology.


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About the article

Received: 2016-02-17

Accepted: 2016-05-11

Published Online: 2018-03-31

Published in Print: 2018-04-25

Citation Information: Mathematica Slovaca, Volume 68, Issue 2, Pages 369–378, ISSN (Online) 1337-2211, ISSN (Print) 0139-9918, DOI: https://doi.org/10.1515/ms-2017-0108.

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