摘要
Suppose that function f（z） is transcendental and meromorphic in the plane. The aim of this work is to investigate the conditions in which differential monomials f（z）f（k）（z） takes any non-zero finite complex number infinitely times and to consider the normality relation to differential monomials f（z）f（k） （z）.
基金
Foundation item： Supported by the National Natural Science Foundation of Education Department of Sichuan Province（2002A031）
Supported by the ＂11.5＂ Research and Study Programs of SWUST（06zx2116）
Supported by the National Natural Science Foundation of China（10271122）
