周 艷
(山西大學(xué) 數(shù)學(xué)科學(xué)學(xué)院,山西 太原 030006)
一類含有奇點(diǎn)的二階常微分方程
周 艷
(山西大學(xué) 數(shù)學(xué)科學(xué)學(xué)院,山西 太原 030006)
構(gòu)造下列方程
的上下解,給出了方程存在周期解的充分條件.
二階常微分方程;周期解;上解;下解
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[4] Kunze M.Periodic solutions of a singular lagrangian systerm related to dispersion-managed fiber communication devices[J].Nonlinear Dyn.Syst.Theory,2001(1):159-167
Second-Order Differential Equations with Mixed Type of Singularity
Zhou Yan
(School of Mathematical Sciences,Shanxi University,Taiyuan 030006,China)
Suffcient conditions for the existence of periodic solutions with mixed type of singularity for second-order differential equations are obtained.The proof of this results rely on the method of upper and lower solution.
second-order differential eqution;periodic solution;upper solution;lower solution
王映苗】
1672-2027(2011)04-0026-03
O175.14
A
2011-06-30
周 艷(1986-),女,山東淄博人,山西大學(xué)數(shù)學(xué)科學(xué)學(xué)院在讀碩士研究生,主要從事常微分方程研究.