摘要
三次微分系统越来越受到人们的重视,但对它却没有一般的处理方法。我们记P_k(x,y)为x、y的k次齐次多项式。
In this paper, we stidy the cubic differential system dy/dx=[P_2(x,y)+P_3(x,y)]/ywhere P_K(x,y) is the polynomianal degree of k about x, y. We obtain some criteria of exist-ence and nonexistence of limit cycle arround the singular point 0(0,0)
出处
《纯粹数学与应用数学》
CSCD
1991年第2期9-12,共4页
Pure and Applied Mathematics
