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arXiv 2006.02542math.DS
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保守Hénon-like映射的可逆扰动

Reversible perturbations of conservative Hénon-like maps

M. S. Gonchenko, S. V. Gonchenko, K. Safonov

摘要:

对于保面积的Hénon-like映射及其合成,我们考虑保持初始映射可逆性但破坏其保守性的光滑扰动。为了构建这样的扰动,我们使用两种方法,原来的方法的基础上写在所谓的交叉形式的映射的可逆性,和经典的Quispel-罗伯茨方法的基础上的初始映射的对合的变化。研究了可逆族中对称周期点的对称破缺分支,其中可逆族中包含二次保守的可定向和不可定向Hénon映射以及两个非对称Hénon映射的乘积(Jacobian为$b$和$b^{-1}$).

英文摘要:

For area-preserving Hénon-like maps and their compositions, we consider smooth perturbations that keep the reversibility of the initial maps but destroy their conservativity. For constructing such perturbations, we use two methods, the original method based on reversible properties of maps written in the so-called cross-form, and the classical Quispel-Roberts method based on a variation of involutions of the initial map. We study symmetry breaking bifurcations of symmetric periodic points in reversible families containing quadratic conservative orientable and nonorientable Hénon maps as well as the product of two asymmetric Hénon maps (with the Jacobians $b$ and $b^{-1}$).

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