Hankel determinant of type $H_2(3)$ for inverse functions of some classes of univalent functions with missing second coefficient

Abstract

In this paper we determine the upper bounds of $|H_2(3)|$ for the inverse functions of functions of some classes of univalent functions, where $H_2(3)(f)=a_3{a}_5-a_4^2$ is the Hankel determinant of a special type.