We study normal criterion of meromorphic functions shared values, we obtain the following. Let be a family of meromorphic functions in a domain , such that function has zeros of multiplicity at least 2, there exists nonzero complex numbers depending on satisfying is a constant; for some ; or , then is normal. These results improve some earlier previous results.
"Normal Criterion Concerning Shared Values." J. Appl. Math. 2012 1 - 7, 2012. https://doi.org/10.1155/2012/312324