Normality through sharing of pairs of functions with derivatives
Complex Variables
2024-11-11 v1
Abstract
Let and let and be three distinct complex numbers. If, there exist a holomorphic function on and a positive constant such that for each and partially share three pairs of functions and on where and are some values in some punctured disk then is normal in . This is an improvement of Schwick's result[Arch. Math. (Basel), \textbf{59} (1992), 50-54]. We also obtain several normality criteria which significantly improve the existing results and examples are given to establish the sharpness of results.
Cite
@article{arxiv.2209.04314,
title = {Normality through sharing of pairs of functions with derivatives},
author = {Kuldeep Singh Charak and Manish Kumar and Anil Singh},
journal= {arXiv preprint arXiv:2209.04314},
year = {2024}
}
Comments
10 pages