Bulletin of the
Korean Mathematical Society
BKMS

ISSN(Print) 1015-8634 ISSN(Online) 2234-3016

Article

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Bull. Korean Math. Soc. 2018; 55(6): 1703-1711

Online first article November 12, 2018      Printed November 30, 2018

https://doi.org/10.4134/BKMS.b170994

Copyright © The Korean Mathematical Society.

Fourth Hankel determinant for the family of functions with bounded turning

Muhammad Arif, Lubna Rani, Mohsan Raza, Pawel Zaprawa

Abdul Wali Khan University, Abdul Wali Khan University, Government College University, Lublin University of Technology

Abstract

The main aim of this paper is to study the fourth Hankel determinant for the class of functions with bounded turning. We also investigate for $2$-fold symmetric and $3$-fold symmetric functions.

Keywords: bounded turning functions, Hankel determinant

MSC numbers: 30C45, 30C50