摘要
研究了一类非齐次微分方程f(k)+ak-1f(k-1)+…+a1f′-(eQ(z)-a0)f=F(z)解的增长性和不动点,所得结果推广了杨连中、王?等的有关定理。
The growth of solutions of f^(k) + ak- 1f^(k-1) +… + a1f′ - ( e^Q(x) - αo )f = F (z) was studied. The following are the conclusions: any solution of the above equation satisfies σ(f) = 1 or σ(f) = ∞ , which generalizes some results of YANG Lianzhong and WANG Jun, et al.
出处
《中国石油大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2007年第5期151-153,共3页
Journal of China University of Petroleum(Edition of Natural Science)
关键词
微分方程
整函数
增长级
超级
differential equation
entire function
order
hyper order