Fourth-order differential subordination and superordination results of meromorphic multivalent functions defined by multiplier transformation

Document Type : Research Paper


1 Department of Mathematics, Faculty of Education for Girls, University of Kufa, Najaf, Iraq

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


In this paper, we obtain some applications of fourth-order differential subordination and superordination results involving multiplier transformation $H_p (\tau,\psi)$, for p-valent functions. Also, we obtain several sandwich-type results.


Volume 12, Special Issue
January 2021
Pages 2297-2313
  • Receive Date: 17 October 2021
  • Revise Date: 20 November 2022
  • Accept Date: 10 December 2022
  • First Publish Date: 10 December 2022