On Geometric properties and Coefficient bounds for ${\mathcal{S}}_B^{\ast }$

Abstract

This paper deals with the geometric properties of functions belonging to the class ${\mathcal{S}}_B^{\ast }$ of starlike functions associated with a balloon-shaped domain, given by \[ \mathcal{S}^{\ast}_{B}= \left\{ f \in \mathcal{A} : \frac{z f'(z)}{f(z)} \prec \frac{1}{1-\log (1+z)} :=B(z), \quad z \in \mathbb{D} \right\}, \] and also derive sharp bounds for the Zalcman functionals, Krushkal inequality, third-order Hankel, Toeplitz and Hermitian-Toeplitz determinant. The sharpness of these results are verified by constructing suitable extremal functions.

We modified the earlier version by including geometric properties of the Ma-Minda function and zalkman function & Kruskal inequality bounds. Changed title and abstract accordingly