Some sandwich theorems for meromorphic univalent functions defined by Hadamard product of integral operators

In the present paper, we obtain some subordination and superordination results, involving the operator T^{a} for functions of the form f(z)=z^{-۱}+\sum_{k=۱}^{\infty}a_k z^{k}, which are meromorphic univalent in the punctured open unit disk these results are applied to obtain sandwich results.

Keywords:

Analytic function , Univalent subordination , Superordination Hadamard (convolution) , Sandwich theorems