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Analysis of some degenerate quadruple collisions
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We consider the trapezoidal problem of four bodies. This is a special problem where only three degrees of freedom are involved. The blow up method of McGehee can be used to deal with the quadruple
collision. Two degenerate cases are studied in this paper, the rectangular and the collinear problems. They have only two degrees of freedom and the analysis of total collapse can be done in a way similar to the one used for the collinear and isosceles problema of three bodies. We fully analyze the flow on the total collision
manifold, reducing the problem of finding heteroclinic connections to the study of a single ordinary differential equation. For the collinear case from which arises a one parameter family of equations the analysis for extreme values of the parameter is done and numerical computations fill up the gap for the intermediate values.
Dynamical consequences for possible motions near total collision
as well as for regularization are obtained.
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Preprint enviat per a la seva publicació en una revista científica: Celestial Mechanics, 1982, volume 28, pp. 49–62 [https://doi.org/10.1007/BF01230659]
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SIMÓ, Carles, LACOMBA, Ernesto. Analysis of some degenerate quadruple collisions. [consulta: 23 de gener de 2026]. [Disponible a: https://hdl.handle.net/2445/151239]