On Certain Improvements on Coefficient Bounds for a Subclass of Convex Functions Associated With Cosine Functions

Umar Raza, Mohsan Raza and Afis Saliu

Journal of Mathematics, 2025, vol. 2025, 1-21

Abstract: In this article, we have studied the class Ccos of normalized analytic functions f satisfying 1+zf″z/f′z≺cosz. We present the improved coefficient bounds and the Hankel determinants of fourth order for functions lying in the class Ccos. We also extended the same results for the inverse function. These findings improve the results recently studied in the literature.

Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jjmath:3512272

DOI: 10.1155/jom/3512272

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