摘要
得到如下结果:设f(z)是级为ρ(ρ<∞)、下级为λ的亚纯函数,而Φ(r)、Ψ(r)是两个(0,∞)上的正值、单调的连续函数,以及Φ(r)为单调递增,且满足:1)limr→∞Ψ(r)Φ(r)=0,2)limr→∞logΨ(r)logΦ(r)=α(α<1)若ρ-λ<1-α,则1)T(Φ(r)±Ψ(r),f)~T(Φ(r),f)(当r→∞);2)当f(z)是整函数时,有logM(Φ(r)±Ψ(r),f)~logM(Φ(r),f)(当r→∞).此结果推广了A.P.Singh和P.M.
we obtain the following results: Lett f(z)be a meromorphic function of order ρ(ρ<∞)and lower order λ, Let Φ(r) and Ψ(r)be two positive, continuous and monotonous functions in(0,∞), and Φ(r) be monotonous increasing, such that 1) lim r→∞ Ψ(r)Φ(r)=0, 2) lim r→∞ log Ψ(r) log Φ(r)=α (α<1), If ρ-λ<1-α, then 1) T(Φ(r)±Ψ(r),f) ̄T(Φ(r),f) (as r →∞); 2)furthermore, if f(z) is an entire function, then we have log M(Φ(r)±Ψ(r),f) ~log M(Φ(r),f) (as r →∞).
出处
《南京大学学报(自然科学版)》
CAS
CSCD
1998年第4期381-386,共6页
Journal of Nanjing University(Natural Science)
关键词
整函数
亚纯函数
级
Meromorphic function
Characteristic function
Order