Sufficient Conditions for the Existence of Periodic Solution of Liènard Equattion  

作　　者：曹登庆 

机构地区：[1]InstituteofAppliedMechanics,SouthwestJiaotongUniversity,Chengdu,610031

出　　处：《Chinese Quarterly Journal of Mathematics》1993年第1期72-76,共5页数学季刊（英文版）

摘　　要：G.Villar's Method^[4] is improved to prove theorems for the existence of periodic solution(limit cycles of Liènard equation and a more general class of nonlinear differential equations.The results obtained in this paper conclude the corresponding theorems in [4].

关 键 词：充分条件 周期解 存在性 Liènard方程 非线性常微分方程 相平面分析 G.Villar方法 

分 类 号：O175.14[理学—数学]