Document Type : Research Paper

Authors

• Youssef Wali Abbas ¹
• Waggas Galib Atshan ²

¹ Department of Mathematics, College of Computer Science and Mathematics, University of Mosul, Ninawaa, Iraq

² Department of Mathematics, College of Science, University of Al-Qadisiyah, Diwaniyah, Iraq

Abstract

In the present paper, we discuss some differential subordinations and superordinations results for a subclass of analytic univalent functions in the open unit disk U using El-Deeb –Lupa's operator $\mathcal{H}^{n}_{\lambda,\tau}$. Also, we study some sandwich theorems.

Keywords

• analytic function
• subordination
• superordination
• sandwich
• El-Deeb-Lupa's operator