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The Sharp Upper Bounds of the Hankel Determinant on Logarithmic Coefficients for Certain Analytic Functions Connected with Eight-Shaped Domains
Journal article   Open access  Peer reviewed

The Sharp Upper Bounds of the Hankel Determinant on Logarithmic Coefficients for Certain Analytic Functions Connected with Eight-Shaped Domains

Pongsakorn Sunthrayuth, Naveed Iqbal, Muhammad Naeem, Yousef Jawarneh and Sallieu K. Samura
Journal of function spaces, Vol.2022, pp.1-12
09/09/2022
DOI: https://doi.org/10.1155/2022/2229960

Abstract

Mathematics Mathematics, Applied Physical Sciences Science & Technology
The present study's intention is to produce exact estimations of some problems involving logarithmic coefficients for functions belonging to the considered subcollection BTsin of the bounded turning class. Furthermore, for the class BTsin, we look into the accurate bounds of the Zalcman inequality, Fekete-Szego inequality along with D(2,1)G(g)/2 and D(2,2)G(g)/2. Importantly, all of these bounds are shown to be sharp.
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https://doi.org/10.1155/2022/2229960View
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