摘要
结出一个界囿定理，用亚纯函数ｆ的零点密指量和ｆ的微分多项式的１－值点密指量界囿其Ｎｅｖａｎｌｉｎｎａ特征函数，推广了ＨａｙｍａｎＬａｎｇｌｅｙ等的结果．
Two inequalities in value distribution are obtained. For a differential polynomial gbof a transcendental meromorphil functionf,lt shows that the Nevanlinna characteristicfunction T(r,f) is bounded from above by a linear combination of N(r,) andN(r,) unless satisfies a certain differential equation. In particular,theseinequalities extend those of Hayman,Langley and Hu.
出处
《山东大学学报（自然科学版）》
CSCD
1994年第2期121-126,共6页
Journal of Shandong University(Natural Science Edition)
基金
国家自然科学基金
关键词
值分布
Hayman
不等式
半纯函数
meromorphic functions
value distribution
Hayman's inequality
