On some differential sandwich theorems involving a multiplier transformation and Ruscheweyh derivative.

In this paper we obtain some subordination and superordination results for the operator IRm;nλ:l and we establish differential sandwich-type theorems. The operator IRm;nλ:l is defined as the Hadamard product of the multiplier transformation I (m; λ l) and Ruscheweyh derivative Rn. [ABSTRACT FROM AUTHOR]