On Sandwich-Type Results for a Subclass of Certain Univalent Functions Using a New Hadamard Product Operator

Abstract

This paper is concerned with studying some results by introducing a new Hadamard product Mγ,b,v,δC,η operator for differential subordination and superordination for certain univalent functions in the open unit disc U. Firstly, we state some basic definitions and required theorems. Furthermore. Some sandwich theorems are derived. The differential subordination theory’s features and outcomes are symmetric to those derived using the differential superordination theory.

Keywords

• analytic function
• subordinate
• differential subordination
• dominant
• Hadamard product
• sandwich theorem