Certain subclasses of multivalent prestarlike functions with negative coefficients

The object of the present paper is to investigate coefficient estimates for functions belonging to the subclasses R p [, ] and C p [, ] of p-valent -prestarlike functions of order and type with negative coefficients. We obtain extreme points, distortion theorems, integral operators and radii of starlikeness and convexity for functions belonging to the classes R p [, ] and C p [, ] . We also obtain several results for the modified Hadamard products of functions belonging to the classes R p [, ] and C p [, ] .