考虑了无闭轨Lienard系统轨线的拓扑分类问题,在先前结论的基础上,找出了无闭轨Lienard系统的8种新的可能存在的轨线结构,证明了该系统共有72种可能的轨线结构.
This paper consider the topological classification of the Lienard systems without any closed orbit.Given that the known results 8 new possible orbit structures are given and the systems have 72 possible orbit structures are proven.