作 者:
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机构地区:
华南师范大学数学科学学院
出 处:
《华南师范大学学报(自然科学版)》
2009年第4期14-19,共6页
摘 要:
研究了微分方程f(k)+Hk-1(z)f(k-1)+…+H0(z)f=F(z)解的增长率,其中Hj(z)=Aj(z)ePj(z)(j=0,1,…,k-1),Aj(z)、F(z)是整函数,σ(Aj)
The growth of solutions of the differential equationf^(k)+Hk-1(z)f^(k-1)+…+H0(z)f=F(z)is investigated,where Hi(z) =Aj(z)e^Pj(z) (j =0,1 ,...,k -1) ,Aj(z) ,F(z) are entire functions, σ(Aj) 〈n, Pi(z) (j =0,1 ,..,k - 1) are polynomials. The results in the existing references are improved and a precise estimate of the growth rate of solutions is obtained for the equations when Ho(z) is dominating to the properties of solutions of the equation.
关 键 词:
微分方程
整函数
级
超级
领 域:
[理学]
[理学]