Conservative Integrators for Many-body Problems

06/11/2021 ∙ by Andy T. S. Wan, et al. ∙ 0

Conservative symmetric second-order one-step schemes are derived for dynamical systems describing various many-body systems using the Discrete Multiplier Method. This includes conservative schemes for the n-species Lotka-Volterra system, the n-body problem with radially symmetric potential and the n-point vortex models in the plane and on the sphere. In particular, we recover Greenspan-Labudde's conservative schemes for the n-body problem. Numerical experiments are shown verifying the conservative property of the schemes and second-order accuracy.

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