Radii of convexity of integral operators (1804.03868v1)

Abstract: The object of the present paper is to study of radius of convexity two certain integral operators as follows \begin{equation*} F(z):=\int_{0}^{z}\prod_{i=1}^{n}\left(f'_i(t)\right)^{\gamma_i}{\rm d}t \end{equation*} and \begin{equation*} J(z):=\int_{0}^{z}\prod_{i=1}^{n}\left(f'i(t)\right)^{\gamma_i}\prod{j=1}^{m} \left(\frac{g_j(z)}{z}\right)^{\lambda_j}{\rm d}t, \end{equation*} where $\gamma_i, \lambda_i\in\mathbb{C}$, $f_i$ $(1\leq i\leq n)$ and $g_j$ $(1\leq j\leq m)$ belong to the certain subclass of analytic functions.