This analysis reveals coefficient inequalities and Hankel determinants for bounded turning functions, indicating their structural properties.
UDC 517.5 We consider a subclass of bounded turning functions BTn-1,L associated with a domain bounded by an epicycloid with $n-1$ cusps. Our primary task is to examine some coefficient inequalities, as well as the second and third Hankel determinants for the newly defined class.
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Nithiyanandham et al. (2025) studied this question.
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