Hankel determinants for starlike and convex functions associated with sigmoid functions

被引：29
作者：
Riaz, Amina [2 ]
Raza, Mohsan [1 ]
Thomas, Derek K. [3 ]
机构：
[1] COMSATS Univ Islamabad, Dept Math, Lahore Campus, Lahore, Pakistan
[2] Govt Coll Univ Faisalabad, Dept Math, Faisalabad, Pakistan
[3] Swansea Univ, Bay Campus, Swansea SA1 8EN, W Glam, Wales
来源：
FORUM MATHEMATICUM | 2022年 / 34卷 / 01期
关键词：
Starlike functions; convex functions; sigmoid functions; Hankel determinants; 3RD KIND; COEFFICIENTS; BOUNDS; 2ND;
D O I：
10.1515/forum-2021-0188
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
This paper is concerned with Hankel determinants for starlike and convex functions related to modified sigmoid functions. Sharp bounds are given for second and third Hankel determinants.
引用
收藏
页码：137 / 156
页数：20
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