利用亚纯函数的Nevanlinna值分布理论,讨论了f^(k)f^n关于值分布的一个结果,进一步推广了Hayman,仪洪勋和叶寿桢等人的相关定理.
A result of value distribution of f^(k)f^n is considered by Nevanlinna's value distribution theory of meromorphic functions.The related theorems of Hayman,Yi Hongxun,Ye Shouzhen et al are further improved.