Symmetry Groups of the Planar Three-Body Problem and Action-Minimizing Trajectories |
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Authors: | Vivina Barutello Davide L Ferrario Susanna Terracini |
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Institution: | (1) Dipartimento di Matematica e Applicazioni, Università di Milano Bicocca, via R. Cozzi, 53, 20125 Milan, Italy |
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Abstract: | We consider periodic and quasi-periodic solutions of the three-body problem with homogeneous potential from the point of view
of equivariant calculus of variations. First, we show that symmetry groups of the Lagrangian action functional can be reduced
to groups in a finite explicitly given list, after a suitable change of coordinates. Then, we show that local symmetric minimizers
are always collisionless, without any assumption on the group other than the fact that collisions are not forced by the group
itself. Moreover, we describe some properties of the resulting symmetric collisionless minimizers (Lagrange, Euler, Hill-type
orbits and Chenciner–Montgomery figure-eights). |
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Keywords: | |
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