New Results on Fourth-Hankel Determinant of a Certain Subclass of Analytic Functions

Authors

  • Youssef Wali Abbas The General Directorate for Education of Ninevah-Ministry of Eduation-Iraq
  • Fedaa Aeyyd Nayyef The General Directorate for Education of Ninevah-Ministry of Eduation-Iraq
  • Waggas Galib Atshan Department of Mathematics, College of Science, University of Al-Qadisiyah, Diwaniyah, Iraq

Keywords:

Superordination, Hankel determinant, A Schwarz function, Chebyshev polynomials, Analytic function

Abstract

    This paper studies the fourth Hankel determinaf for a subclass of analytic functions, denoted by N( , defined via athir-order differential subordination involving an exponential function. Sharp coefficient bounds for lanl, where  , are obtained, and an upper bound for the fourth Hankel determinant  is established, contributing to the theary of geometric function classes.

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Published

2026-01-22

How to Cite

Abbas, Y. W. ., Nayyef , F. A. ., & Atshan, W. G. . (2026). New Results on Fourth-Hankel Determinant of a Certain Subclass of Analytic Functions. Journal of Natural and Applied Sciences, 1(10), 226–239. Retrieved from https://uraljournal.remahcenter.com/papers/index.php/ural/article/view/26

Issue

Vol. 1 No. 10 (2025): JOURNAL OF NATURAL AND APPLIED SCIENCES URAL NO10 V1

Section

Articles

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