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亚纯函数的特征函数的性质 被引量:2

ON THE PROPERTIES OF NEVANLINNA CHARACTERISTIC FUNCTIONS AND MAXIMUM MODULI FUNCTIONS
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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 →∞).
作者 孙建武
机构地区 淮阴师院数学系
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 Meromorphic function Characteristic function Order
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同被引文献41

  • 1方明亮.关于亚纯函数的正规增长性[J].南京师大学报(自然科学版),1993,16(3):16-22. 被引量:3
  • 2金路,戴崇基.整函数的亏函数与渐近函数[J].数学年刊(A辑),1989,10(4):433-440. 被引量:3
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