By folding an autonomous system of rational equations in the plane to a scalar difference equation, we show that the rational system has coexisting periodic orbits of all possible periods as well as stable aperiodic orbits for certain parameter ranges.
Chaotic phenomena in generic unfoldings of the Hamilton Hopf bifurcation with emphasis on the restricted planar circular 3-body problem beyond the Gascheau-Routh mass ratio
Arnold Diffusion in a Restricted Planar Four-Body Problem
构造了一类能量快速增长的平面四体问题。所考虑的系统是限制性平面圆形三体问题(RPC3BP)的准周期摄动。采用Gelfreich-Turaev和de la Llave的机制来获得快速的能量增长。扩散是由围绕$L_1$和$L_2$拉格朗日点及其异宿交点的两个李雅普诺夫周期轨道形成的异宿环产生的。我们的模型是第一个已知的例子在天体力学的先验混沌情况下的阿诺德扩散。
Explicit bounds for rational points near planar curves and metric Diophantine approximation
本文的主要目的是完善最初在[Ann. of Math.]中发展起来的度量丢番图逼近理论。(2)166(2007),第367 -426页]。考虑到这一目标,在这里,我们第一次获得完全明确的界限的数量有理点附近的平面曲线。此外,引入扰动方法,我们将施加在曲线上的平滑条件降低到$C^1$(最低可能)。这种方法拓宽了自然方向上非退化的概念,并将一类新的拓扑完备平面曲线引入到丢番图逼近理论中。总之,我们的发现改进和完善了[Ann. of Math. (2)166(2007),p.367-426],并推广了Kleinbock和Margulis在[Ann. of Math. (2),148(1998),第339 -360页]中的非简并性概念之外的维度2。
Topological Horseshoe Induced by Periodic Switching Between Non-Isochronous Planar Systems
School of Mathematics and Statistics, Huazhong University of Science and Technology(华中科技大学数学与统计学院);Hubei Key Laboratory of Engineering Modeling and Scientific Computing, Huazhong University of Science and Technology(华中科技大学工程建模与科学计算湖北省重点实验室)