【摘要】 采用代数运算方法 ,研究了一类特殊的三次系统的中心—焦点判定问题 ,求出了系统奇点量的最高阶数 ;同时给出了系统的可积性条件及有关相应实三次系统的一些结果更多还原

【Abstract】 In this paper,for a class of special system the highest singular point of the origin and the necessary and sufficient conditions in which a regular integral exists in a neighborhood of the origin are obtained;some results about the corresponding real cubic system are also given.更多还原