Constructing the Hyperbolic Plane as the reduction of a three-body problem
arXiv:1609.05220
Abstract
We construct the hyperbolic plane with its geodesic flow as the scale plus symmetry reduction of a three-body problem in the Euclidean plane. The potential is where is the triangle's moment of inertia and its area. The reduction method uses the Jacobi-Maupertuis metric, following the author's earlier paper "Putting Hyperbolic Pants on a Three-body Problem".
6 pages, 1 figure