As Is Well Known About Lissajous Curves And Ellipses

This is a continuation of "As is well known about elliptic trajectories" where I have put it as a sort of homework to find out which force fields support elliptic trajectories. The "problem" has been solved in a response to my first post. That other field is known as isotropic harmonic oscillator. It is discussed below. Now I will come with my personal story behind all this. read more

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