A note on certain classes of starlike functions (Q1078354)

A number of distortion theorems are proved for the classes \({\mathcal T}_{\alpha}(n)\) and \({\mathcal C}_{\alpha}(n)\) of analytic and univalent functions with negative coefficients, studied recently by \textit{S. K. Chatterjea} [J. Pure Math. 1, 23-26 (1981; Zbl 0514.30010)]. Several interesting results for the convolution product of functions belonging to the classes \({\mathcal T}_{\alpha}(n)\) and \({\mathcal C}_{\alpha}(n)\) are also presented rather systematically.