关于“广义Liénard方程的周期解”一文的注记

Note on the Paper"Periodic Solutions of Generalized Lienard Equations"

中文摘要:

      本文研究广义Ｌｉéｎａｒｄ方程x+f(x,x)x+g(x)=0的周期解的存在性，所得结果不仅较大地改进了文［１］的定理而且还指出了文［１］中的错误。

英文摘要:

      In this paper,some new sufficient conditions ensuring that the generalized Lienard equation x+f(x,x)x+g(x)=0 has at least one non-zero periodic solution are abtained. Our results not only improve those in [1] but also correct an error appeared in [1].