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arXiv 2003.03110math.DS
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扰动相对论性Kepler问题的周期解

Periodic solutions to a perturbed relativistic Kepler problem

Alberto Boscaggin, Walter Dambrosio, Guglielmo Feltrin

摘要:

本文考虑相对论性Kepler扰动问题\begin{equation*} \dfrac{\mathrm{d}}{\mathrm{d}t}\left(\dfrac{m\dot{x}}{\sqrt{1-|\dot{x}|^2/c^2}}\right)=-α\, \dfrac{x}{|x|^3}+\varepsilon \, \nabla_x U(t,x), \qquad x \in \mathbb{R}^2 \setminus \{0\}, \end{equation*},其中$m, α> 0$,$c$是光速,$U(t,x)$是第一个变量为$T$ -周期的函数.当$\varepsilon > 0$足够小时,证明了该问题存在从不变环面分支出的具有指定卷绕数的$T$ -周期解.

英文摘要:

We consider a perturbed relativistic Kepler problem \begin{equation*} \dfrac{\mathrm{d}}{\mathrm{d}t}\left(\dfrac{m\dot{x}}{\sqrt{1-|\dot{x}|^2/c^2}}\right)=-α\, \dfrac{x}{|x|^3}+\varepsilon \, \nabla_x U(t,x), \qquad x \in \mathbb{R}^2 \setminus \{0\}, \end{equation*} where $m, α> 0$, $c$ is the speed of light and $U(t,x)$ is a function $T$-periodic in the first variable. For $\varepsilon > 0$ sufficiently small, we prove the existence of $T$-periodic solutions with prescribed winding number, bifurcating from invariant tori of the unperturbed problem.

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