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arXiv 1812.03038math.DS
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一种杂合异宿环

A hybrid heteroclinic cycle

Sofia Castro, Alexander Lohse

摘要:

使用$\mathbb{R}^4$中的向量场,我们提供了两个平衡之间的鲁棒异宿循环的例子,该平衡显示了由众所周知的低维异宿结构类型所表现出的特征的混合,包括简单、准简单和伪简单循环。我们的循环由一个坐标轴上的两个平衡点和两个联络点组成。其中一个连接是一维的,而另一个是二维的。我们将我们的异宿周期与文献中的其他结构相似的周期进行比较,并说明用于分析这些周期的标准方法无法提供足够的信息,我们的例子的吸引力属性。包含在不变三维子空间中的两个子循环的不稳定性似乎表明我们的循环一般是完全不稳定的。虽然这个周期是最简单的可能之一,存在于低维,完整的研究我们的周期的稳定性,使用标准的技术返回地图减少是不可能的混合性质的返回地图。

英文摘要:

Using a vector field in $\mathbb{R}^4$, we provide an example of a robust heteroclinic cycle between two equilibria that displays a mix of features exhibited by well-known types of low-dimensional heteroclinic structures, including simple, quasi-simple and pseudo-simple cycles. Our cycle consists of two equilibria on one coordinate axis and two connections. One of the connections is one-dimensional while the other is two-dimensional. We compare our heteroclinic cycle to others in the literature that are similar in architecture, and illustrate how the standard methods used to analyse those cycles fail to provide sufficient information on the attraction properties of our example. The instability of two subcycles contained in invariant three-dimensional subspaces seems to indicate that our cycle is generically completely unstable. Although this cycle is one of the simplest possible and exists in low-dimension, the complete study of the stability of our cycle by using the standard techniques for return map reduction is not possible given the hybrid nature of the return map.

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