摘要
已知系统. 的奇点O(O,O)为退化结点,能否存在系统 使O(0,0)为临界结点或焦点或正常结点或鞍点?其中X(x, y)为x,y的非线性函数。
We have known, {dx/dy=ax+by dy/dt=cx+dy the system's singularity 0(0,0) is the degenerate nodal point, whether there is the system of {dx/dt=ax+by+X(x,y) dy/dt=cx+dy+Y(x,y) ? If it exists, can the system makes O(0,0) be the critical nodal point or the focal point or the normal nodal point or the saddle point? Among them X(x,y), Y(x,y) is x,y's non linear function, and lim(x^2+y^2→0) X(x,y)/√x^2+y^2=lim(x^2+y^2→0)Y(x,y)/√x^2+y^2=0.
出处
《哈尔滨师范大学自然科学学报》
CAS
2005年第5期21-24,共4页
Natural Science Journal of Harbin Normal University
关键词
常微分方程
轨线
定性结构
稳定性
退化结点
The ordinary differential equation
Path curve
Stability
Degenerate nodal point