关于Liénard方程存在极限环的两个定理

ON TWO THEOREMS OF THE EXISTENCE OF LIMIT CYCLE OF LIENARD EQUATIONS

本文我们利用Hopf分支定理给出了Liénard方程存在极限环和两个推广的判别准则。

In this paper, we give two criterions about existerce of limit cycle of the lienard equation using theory of Hopf bifurcation. A main result in [1] is extended.