Certain Subclasses of Meromorphic Univalent Function Involving Differential Operator

The main object of the present paper is to introduce the class of meromorphic univalent function K * (σ,τ,S) defined by differential operator with study some geometric properties like coefficient inequality , growth theorem and distortion theorem, radii of starlikeness and convexity of f(z) in the class K * (σ,τ,S) .Also the concept of convolution (Hadamard product) investigate and Neighborhoods of the elements of class K * (σ,τ,S) are obtained.