平面四次微分系统的局部拓扑结构  

THE LOCAL TOPOLOGICAL CONSTRUCTION OF FOURTH-PLANE DIFFERENTIAL SYSTEM

作　　者：李秀珍[1] 

机构地区：[1]山东建筑工程学院

出　　处：《聊城大学学报（自然科学版）》1997年第3期15-22,25,共9页Journal of Liaocheng University:Natural Science Edition

摘　　要：讨论了平面四次微分系统的特殊方向及在相平面上国成的角城内，奇点附近的轨线的分布；给出了右多端多项式系数构成的判别准则．In this paper,the special directions of a class of fourth-plane differential systemand distribution of trajectory near singularity in angular domain of phase Plane was di cussed. some criteria was given by coefficient of polynomial.

关 键 词：四次微分系统 拓扑结构 特殊方向 

分 类 号：O175[理学—数学]