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一类q-差分亚纯函数零点及不动点的估计 被引量:1

The Estimate for Zeros and Fixed Points of a Kind of q-Differences Meromorphic Functions
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摘要 利用Nevanlinna的基本理论与方法,讨论了一类慢增长亚纯函数差分的零点和不动点,设f是超越亚纯函数,在一定条件下,证明了q-差分函数Fk(z)=f(q1z)+f(q2z)+…+f(qkz)-kf(z)或者q-差商函数Gk(z)=Fk(z)/f(z)至少有一个具有无穷多个零点和至少有一个具有无穷多个不动点. In this paper,f is supposed a transcendental meromorphic function by using the basic theory and method of Nevanlinna to estimate the number of zeros and fixed point of the differences of slowly growth meromorphic functions.On the certain condition the q-differences Fk(z) = f(q1z) + f(q2z) +…+ f(qkz)-kf(z) or q-difference quotient Gk(z)=(Fk(z)/f(z)) with infinite number of zero are proved,and Fk(z)or Gk(z) with infinite fixed point are proved as well as.
出处 《江西师范大学学报(自然科学版)》 CAS 北大核心 2011年第2期116-120,共5页 Journal of Jiangxi Normal University(Natural Science Edition)
基金 国家自然科学基金(10871108) 江西师范大学研究生创新基金(YJS2010010)资助项目
关键词 亚纯函数 q-差分 q-差商 零点 不动点 meromorphic function q-difference q-difference quotient zero fixed point
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