关于一类微分单项式的值分布

On Value Distribution of a Class Differential Monomial

该文建立了一个基本不等式（定理１），其中超越亚纯函数ｆ（ｚ）的特征函数由Ｎ（ｒ，１／ｆ）和Ｎ（ｒ，１／（ψ－φ））所界囿．ψ＝ｆｎ０（ｆ′）ｎ１…（ｆ（ｋ））ｎｋ，φ是满足Ｔ（ｒ，φ）＝ｓ（ｒ。

In this paper,a fundamental inequality (Theorem 1) is established,in which the characteristic function T(r,f) of a transcendental meromorphic function is bounded by the N(r,1f) and N(r,1ψ-φ), where ψ=f n 0 (f′) n 1 …(f (k) ) n k ,φ is a small function of f(z).