Solution of center-focus problem for a class of cubic systems

被引:0
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作者
Bo Sang
Chuanze Niu
机构
[1] Liaocheng University,School of Mathematical Sciences
关键词
Center variety; Isochronous center; Center conditions; Integrating factor; 34C05; 34C07;
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摘要
For a class of cubic systems, the authors give a representation of the nth order Liapunov constant through a chain of pseudo-divisions. As an application, the center problem and the isochronous center problem of a particular system are considered. They show that the system has a center at the origin if and only if the first seven Liapunov constants vanish, and cannot have an isochronous center at the origin.
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页码:149 / 160
页数:11
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