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arXiv 1712.07155math.DS
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梯形中心构型

Trapezoid central configurations

Montserrat Corbera, Josep M. Cors, Jaume Llibre, Ernesto Perez-Chavela

摘要:

我们对所有平面四体中心构型进行了分类,其中两对物体位于平行线上。利用直角坐标,我们证明了正质量四体梯形中心构型的集合形成了一个二维曲面,在该曲面的边界上有两个对称族,菱形和等腰梯形.我们还证明,对于一个给定的位置的机构,在某些情况下,一个特定的顺序的质量确定的几何配置,即锐角或钝角梯形中心配置。我们还证明了两对质量相等的非对称梯形中心组态的存在性。

英文摘要:

We classify all planar four-body central configurations where two pairs of the bodies are on parallel lines. Using Cartesian coordinates, we show that the set of four-body trapezoid central configurations with positive masses forms a two-dimensional surface where two symmetric families, the rhombus and isosceles trapezoid, are on its boundary. We also prove that, for a given position of the bodies, in some cases an specific order of the masses determine the geometry of the configuration, namely acute or obtuse trapezoid central configuration. We also prove the existence on non-symmetric trapezoid central configuration with two pairs of equal masses.

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。

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