New sandwich results for univalent functions defined by the Tang-Aouf operator

Document Type : Research Paper


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


In this paper, we study some differential subordination and subordination results for certain subclass of univalent functions in the open unit disc U using generalized operator $H^{\lambda,\delta}_{\eta,\mu}$. Also, we derive some sandwich theorems.


Volume 12, Special Issue
January 2021
Pages 2521-2530
  • Receive Date: 18 October 2021
  • Revise Date: 04 December 2021
  • Accept Date: 18 December 2021
  • First Publish Date: 28 December 2021