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Hankel determinant for certain new classes of analytic functions associated the activation functions
YueJuan Sun1, Muhammad Arif2, Khalil Ullah2
1School of Mathematics and Statistics, Shangqiu Normal University, Shangqiu 476000, Henan, P.R. China.
Abstract:
In this article, we introduce two new classes of analytic functions and which are associated with the activation functions and defined by the ratio of analytic representations of convex and starlike functions. For functions in these classes, our primary goal is to determine the sharp upper bounds of second and third Hankel determinants.
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