A Class of Multivalent Functions Involving Ruscheweyh Derivatives.

Let Ap(p ∈ N) be the class of functions ƒ(z) = zp + ap+1zp+1 + ... analytic in the unit disk. By usiug the Ruscheweyh derivative, we introduce a subclass Tp(c, α, λ, μ) of Ap which is relevant to the classes of starlike and convex functions. The object of the present paper is to discuss some properties of functions in the class Tp(c, α, λ, μ). [ABSTRACT FROM AUTHOR]