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 Fourth Hankel determinant for the family of functions with bounded turning Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1703-1711 https://doi.org/10.4134/BKMS.b170994Published online November 12, 2018Printed November 30, 2018 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 Downloads: Full-text PDF