On certain differential sandwich theorems involving a generalized Sǎlǎgean operator and Ruscheweyh operator

Abstract

In the present paper we introduce sufficient conditions for subordination and superordination involving the operator DRλm,n$DR_\lambda ^{m,n} $ and also we obtain sandwich-type results.

Keywords

• analytic functions
• differential operator
• differential subordination
• differential superordination
• primary 30c45