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arXiv 2407.09800math.DS
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平面三体问题中的速度冲点与冲点时刻的界

Velocity Syzygies and Bounding Syzygy Moments in the Planar Three-Body Problem

Alexei Tsygvintsev

AI总结:

该研究针对牛顿平面三体问题,定义了速度冲点概念,证明负总能量下无碰撞解有无穷多速度冲点,并借助矩阵Riccati方程比较理论得到冲点时刻的新上下界。

摘要:

我们研究牛顿平面三体问题,将冲点(速度冲点)定义为三个天体的位置(速度)共线的构型。我们证明:若总能量为负,每个无碰撞解都有无穷多个速度冲点。具体而言,在包含三个连续冲点的每个时间区间内,三个天体的速度都会变为平行。利用矩阵Riccati方程的比较理论,我们推导了冲点发生时刻的新上下界。

英文摘要:

We consider the Newtonian planar three-body problem, defining a syzygy (velocity syzygy) as a configuration where the positions (velocities) of the three bodies become collinear. We demonstrate that if the total energy is negative, every collision-free solution has an infinite number of velocity syzygies. Specifically, the velocities of the three bodies become parallel within every interval of time containing three consecutive syzygies. Using comparison theory for matrix Riccati equations, we derive new upper and lower bounds on the moments when syzygies occur.

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