5次z2等变向量场中临界周期的弱中心和局部分岔

Yusen Wu, Feng Li
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引用次数: 0

摘要

借助于代数操纵器mathematica,我们确定了5次等变向量场[公式:见文]处弱中心的顺序和原点以及局部临界周期的个数。我们证明了[公式:见文]和原点可以是无限阶的弱中心(即等时中心),最多是有限阶的四阶弱中心。进一步证明了在中心和原点处最多有四个局部临界周期分叉。我们的方法是计算代数技术的结合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Weak Centers and Local Bifurcation of Critical Periods in a Z2-Equivariant Vector Field of Degree 5
With the help of algebraic manipulator-Mathematica, we identify the order of weak centers at [Formula: see text] and the origin as well as the number of local critical periods in a [Formula: see text]-equivariant vector field of degree 5. We show that [Formula: see text] and the origin can be weak centers of infinite order (i.e. isochronous center) and at most fourth-order weak centers of finite order. Furthermore, we prove that at most four local critical periods bifurcate from the bicenter and the origin, respectively. Our approach is a combination of computational algebraic techniques.
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