Title: Third Hankel Determinants for Subclasses of Univalent Functions
Abstract:The main aim of this paper is to discuss the third Hankel determinants for three classes: $$S^*$$ of starlike functions, $$\mathcal {K}$$ of convex functions and $$\mathcal {R}$$ of functions whose de...The main aim of this paper is to discuss the third Hankel determinants for three classes: $$S^*$$ of starlike functions, $$\mathcal {K}$$ of convex functions and $$\mathcal {R}$$ of functions whose derivative has a positive real part. Moreover, the sharp results for twofold and threefold symmetric functions from these classes are obtained.Read More