Open AccessOn Subclasses of Bi-Univalent Functions Related to Quasi Subordination
Author(s) -
Dhirgam Allawy Hussein,
Sahar Jaafar Mahmood
Publication year - 2021
Publication title -
earthline journal of mathematical sciences
Language(s) - English
Resource type - Journals
ISSN - 2581-8147
DOI - 10.34198/ejms.6221.427438
Subject(s) - subordination (linguistics) , univalent function , mathematics , pure mathematics , analytic function , philosophy , linguistics
In this paper, we introduce and investigate two subclasses M_Σ^q (λ,γ,h) and H_Σ^q (η,δ,h) of bi-univalent functions defined by quasi-subordination. We find estimates on the Taylor-Maclaurin coefficients |a_2 | and |a_3 | for functions in these subclasses.