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The Four Star Ballet is interesting. What appears to be a perfectly symmetrical, balanced and stable system goes haywire at ~Time=30. Up until that time the positions and velocities are all mirror images of each other. At T=30 the positions start to vary by 0.1.
I assume this is just accumulation of rounding errors in the program. But in the real world it makes you wonder how any long term stable systems manage to develop.
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