Sharp bounds of Fekete-Szegő functional for quasi-subordination class
und | 17. Aug. 2019
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Online veröffentlicht: 17. Aug. 2019
Seitenbereich: 87 - 98
Eingereicht: 07. Juni 2018
DOI: https://doi.org/10.2478/ausm-2019-0008
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© 2019 Shashi Kant et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
In the present paper, we introduce a certain subclass 𝒦q(λ, γ, h) of analytic functions by means of a quasi-subordination. Sharp bounds of the Fekete-Szegő functional for functions belonging to the class 𝒦q(λ, γ, h) are obtained. The results presented in the paper give improved versions for the certain subclasses involving the quasi-subordination and majorization.