Sharing Values And Normality Criteria

The dissertation studies the meromorphic functions and normality with the of theory of normal families. The case of meromorphic functions and their kth derivative sharing one none-zero complex value is discussed. One normality theorem which improves the work of other people is obtained.On the other hand,studies the uniqueness of meromorphic functions. The acquired theorems extend the results of Fang Mingliang and Hua Xinhou.