arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1603.03342math.DSmath-phmath.MP
收藏

弯曲$N$ -体问题的中心构型

Central configurations of the curved $N$-body problem

Florin Diacu, Cristina Stoica, Shuqiang Zhu

摘要:

在非零常曲率空间中考虑天体力学的$N$ -体问题。使用锁定惯性张量的概念,我们计算系统的转动惯量球和双曲球,并表明,我们可以恢复在欧几里德的情况下的经典定义。在证明了相对平衡存在的一些准则之后,我们找到了一种自然的方法来使用惯性矩定义弯曲空间中的中心构型的概念,并表明我们的定义在形式上类似于支配经典问题的定义。我们开发的中心配置的存在性准则帮助我们提供了几个例子,并证明,对于任何给定的点质量的领域和双曲球,中心配置总是存在的。我们结束我们的文件的结果有关的中心配置的数量,躺在同一测地线,从而延长著名的莫尔顿定理双曲球,并指出,它没有直接推广到领域,其中计数变得复杂,即使在情况$N=2$。

英文摘要:

We consider the $N$-body problem of celestial mechanics in spaces of nonzero constant curvature. Using the concept of locked inertia tensor, we compute the moment of inertia for systems moving on spheres and hyperbolic spheres and show that we can recover the classical definition in the Euclidean case. After proving some criteria for the existence of relative equilibria, we find a natural way to define the concept of central configuration in curved spaces using the moment of inertia, and show that our definition is formally similar to the one that governs the classical problem. The existence criteria we develop for central configurations help us provide several examples and prove that, for any given point masses on spheres and hyperbolic spheres, central configurations always exist. We end our paper with results concerning the number of central configurations that lie on the same geodesic, thus extending the celebrated theorem of Moulton to hyperbolic spheres and pointing out that it has no straightforward generalization to spheres, where the count gets complicated even in the case $N=2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑