New Class of Univalent Functions with Negative Coefficients Defined by Ruscheweyh Derivative

In this paper, we have discussed a subclass S(γ,δ,μ,λ ) of univalent functions with negative coefficients defined by Ruscheweyh derivative in the unit disk U = {z ϵ С : | z | 1}. We obtain basic properties like coefficient inequality, distortion and covering theorem, radii of starlikeness, convexity and close-to-convexity, extreme points, Hadamard product, closure theorems and convolution operator for functions belonging to our class.