Symmetric Regularization, Reduction and Blow-Up of the Planar Three-Body Problem

Details Symmetric Regularization, Reduction and Blow-Up of the Planar Three-Body Problem Symmetric Regularization, Reduction and Blow-Up of the Planar Three-Body Problem

2012-02-05

arxiv.org/abs/1202.0972v1

Mathematics

Classical Analysis and ODEs

51 pages, 4 figures

Scientific paper

We carry out a sequence of coordinate changes for the planar three-body problem which successively eliminate the translation and rotation symmetries, regularize all three double collision singularities and blow-up the triple collision. Parametrizing the configurations by the three relative position vectors maintains the symmetry among the masses and simplifies the regularization of binary collisions. Using size and shape coordinates facilitates the reduction by rotations and the blow-up of triple collision while emphasizing the role of the shape sphere. By using homogeneous coordinates to describe Hamiltonian systems whose configurations spaces are spheres or projective spaces, we are able to take a modern, global approach to these familiar problems. We also show how to obtain the reduced and regularized differential equations in several convenient local coordinates systems.

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