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关于某类二阶亚纯系数微分方程解的增长性 被引量:1

ON THE GROWTH OF SOLUTIONS FOR CERTAIN SECOND ORDER LINEAR DIFFERENTIAL EQUATIONS WITH MEROMORPHIC COEFFICIENTS
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摘要 讨论了微分方程f″+A1eP(z)f′+A0eQ(z)f=0解的增长性,其中P(z)、Q(z)为n(n≥1)次多项式,Aj(z)(Aj(z)≠0;j=0,1)是亚纯函数且σ(Aj)<n.当P(z)和Q(z)的系数满足某些条件时,得到了方程的每个非零解f具有无穷级,并进一步估计了其无穷级解的增长性,得到了其超级的一个下界. The growth of solutions for differential equations f" + A1 e^P(z)f' + A0e^Q(z)f = 0 is investigated,where P ( z ) , Q(z) are polynomials with degree n (n≥1), and Aj(z) (Aj(z)≠0;j=0,1) are meromorphic functions with σ(Aj) 〈 n. Suppose that the coefficients of P(z) and Q(z) satisfy certain conditions. It is showed that every meromorphic solution f( ≠ 0) of the equations has infinite order. The growth of every infinite solution of the equations is estimated and a lower bound of the hyper - order of the solutions is obtained.
出处 《华南师范大学学报(自然科学版)》 CAS 2007年第1期15-19,共5页 Journal of South China Normal University(Natural Science Edition)
基金 广东省自然科学基金资助项目(04010360)
关键词 微分方程 亚纯函数 超级 differential equation meromorphic function the order of growth hyper - order
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  • 1王柔怀 伍卓群.常微分方程讲义[M].北京:人民教育出版社,1963.1.
  • 2LAINE I. Nevanlinna Theory and Complex Differential Equations[M]. Berlin: W de Gruyter, 1993.
  • 3HELLERSTEIN S, ROSSI J. Zeros of meromorphic solutions of second order linear differential equations [ J ] Math Z, 1986,192:603 - 612.

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