On quasi-subordination for bi-univalency involving generalized distribution series associated with remodelled $s$-sigmoid function

Document Type : Research Paper


1 Department of Mathematical Sciences, Federal University of Technology, Akure, Nigeria

2 Department of Pure and Applied Mathematics\\Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria

3 Institute of Mathematics and Applications, Andharua, Bhubaneswar-751029, Odisha, India


In this paper, the authors investigate the bi-univalency of the generalized distribution series associated with quasi-subordination and remodelled $s$-sigmoid function. The early few coefficients are obtained to achieve our goal. The results obtained are new to the history of bi-univalency.


Volume 14, Issue 1
January 2023
Pages 2213-2222
  • Receive Date: 05 September 2022
  • Revise Date: 06 December 2022
  • Accept Date: 09 December 2022
  • First Publish Date: 18 December 2022