Third Hankel Determinants for Subclasses of Univalent Functions

被引：102
|
作者：
Zaprawa, Pawel [1 ]
机构：
[1] Lublin Univ Technol, Fac Mech Engn, Dept Math, Nadbystrzycka 38D, PL-20618 Lublin, Poland
来源：
MEDITERRANEAN JOURNAL OF MATHEMATICS | 2017年 / 14卷 / 01期
关键词：
Hankel determinant; starlike functions; convex functions; n-fold symmetric functions; COEFFICIENTS;
D O I：
10.1007/s00009-016-0829-y
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
The main aim of this paper is to discuss the third Hankel determinants for three classes: S* of starlike functions, K of convex functions and R of functions whose derivative has a positive real part. Moreover, the sharp results for twofold and threefold symmetric functions from these classes are obtained.
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页数：10
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