Hankel determinants, Fekete-Szegö inequality, and estimates of initial coefficients for certain subclasses of analytic functions

Hankel determinants, Fekete-Szegö inequality, and estimates of initial coefficients for certain subclasses of analytic functions

In this paper, we define new subclasses of analytic functions related to a modified sigmoid function and analytic univalent function. Then, we attempt to investigate the upper bounds of the third and fourth Hankel determinant in the special case. Further, bound on third Hankel determinant of its inv...

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Bibliographic Details
Main Authors: Wenzheng Hu, Jian Deng
Format: Article
Language:English
Published: AIMS Press 2024-02-01
Series:AIMS Mathematics
Subjects:
analytic function
modified sigmoid function
subordination
hankel determinant
upper bound
fekete-szegöinequality
initial coefficients
Online Access:https://www.aimspress.com/article/doi/10.3934/math.2024314?viewType=HTML

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https://www.aimspress.com/article/doi/10.3934/math.2024314?viewType=HTML

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