International Journal of Mathematics and Mathematical Sciences
Volume 14 (1991), Issue 3, Pages 619-623
doi:10.1155/S0161171291000856
Abstract
A new subclass R(α), 0≤α≤1, of the class St(1/2) the class of
starlike functions of order 1/2 is introduced and it is shown that R(α) is closed
with respect to the Hadamard product of analytic functions. Some sufficient
conditions for the normalized regular functions to be univalent in the unit disk E are
given.