دورية أكاديمية

Sharp coefficient inequalities of starlike functions connected with secant hyperbolic function

التفاصيل البيبلوغرافية
العنوان: Sharp coefficient inequalities of starlike functions connected with secant hyperbolic function
المؤلفون: Mohsan Raza, Khadija Bano, Qin Xin, Fairouz Tchier, Sarfraz Nawaz Malik
المصدر: Journal of Inequalities and Applications, Vol 2024, Iss 1, Pp 1-18 (2024)
بيانات النشر: SpringerOpen, 2024.
سنة النشر: 2024
المجموعة: LCC:Mathematics
مصطلحات موضوعية: Analytic functions, Starlike functions, Cardioid domain, Hankel determinant, Zalcman functional, Mathematics, QA1-939
الوصف: Abstract This article comprises the study of class S E ∗ $\mathcal{S}_{E}^{\ast }$ that represents the class of normalized analytic functions f satisfying ς f ′ ( z ) / f ( ς ) ≺ sec h ( ς ) ${\varsigma \mathsf{f}}^{\prime }(z)/\mathsf{f}( {\varsigma })\prec \sec h ( \varsigma ) $ . The geometry of functions of class S E ∗ $\mathcal{S}_{E}^{\ast }$ is star-shaped, which is confined in the symmetric domain of a secant hyperbolic function. We find sharp coefficient results and sharp Hankel determinants of order two and three for functions in the class S E ∗ $\mathcal{S}_{E}^{\ast }$ . We also investigate the same sharp results for inverse coefficients.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1029-242X
Relation: https://doaj.org/toc/1029-242X
DOI: 10.1186/s13660-024-03134-0
URL الوصول: https://doaj.org/article/c1f088473820408f8ea3f87e8c48b92f
رقم الأكسشن: edsdoj.1f088473820408f8ea3f87e8c48b92f
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:1029242X
DOI:10.1186/s13660-024-03134-0