周 艳
(山西大学 数学科学学院,山西 太原 030006)
一类含有奇点的二阶常微分方程
周 艳
(山西大学 数学科学学院,山西 太原 030006)
构造下列方程
的上下解,给出了方程存在周期解的充分条件.
二阶常微分方程;周期解;上解;下解
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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 艳(1986-),女,山东淄博人,山西大学数学科学学院在读硕士研究生,主要从事常微分方程研究.