关于二次Liénard型方程$\ddot{x}+f\left(x\right) \dot{x}^{2}+g\left( x\right) =0$的李点对称分类的观察[ JMP 54，053506（2013）]及其勘误[ JMP 55，059901（2014）]
An observation on Classification of Lie point symmetries for quadratic Liénard type equation $\ddot{x}+f\left(x\right) \dot{x}^{2}+g\left( x\right) =0$ [JMP 54, 053506 (2013)] and its erratum [JMP 55, 059901 (2014)]
摘要：
我们证明了一个简化的一些最近的工作分类的李对称的Liénard型二次方程。我们认为，这个问题本来可以更简单地解决。
英文摘要：
We demonstrate a simplification of some recent works on the classification of the Lie symmetries for a quadratic equation of Liénard type. We observe that the problem could have been resolved more simply.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
