Some sandwich theorems for meromorphic univalent functions defined by Hadamard product of integral operators

Document Type : Research Paper


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

2 Department of Mathematics, College of Education for Girls, University of Kufa, Najaf, Iraq


In the present paper, we obtain some subordination and superordination results, involving the operator $T^{a}$ for functions of the form $f(z)=z^{-1}+\sum_{k=1}^{\infty}a_k z^{k}$, which are meromorphic univalent in the punctured open unit disk these results are applied to obtain sandwich results.


Volume 12, Special Issue
January 2021
Pages 2403-2412
  • Receive Date: 13 October 2021
  • Revise Date: 10 November 2021
  • Accept Date: 15 December 2021
  • First Publish Date: 28 December 2021