期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
THE PROBLEM OF THE CENTRE FOR CUBIC DIFFERENTIAL SYSTEMS WITH TWO HOMOGENEOUS INVARIANT STRAIGHT LINES AND ONE INVARIANT CONIC
1
作者 Dumitru Cozma 《Annals of Differential Equations》 2010年第4期385-399,共15页
For cubic differential systems with two homogeneous invariant straight lines and one invariant conic, it is proved that a singular point with pure imaginary eigenvalues (a weak focus) is a centre if and only if the fi... For cubic differential systems with two homogeneous invariant straight lines and one invariant conic, it is proved that a singular point with pure imaginary eigenvalues (a weak focus) is a centre if and only if the first two Lyapunov quantities Lj , j = 1, 2 vanish. 展开更多
关键词 cubic differential systems center-focus problem invariant algebraic curves INTEGRABILITY
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部