Physics is shit

So you have this gravity law. But does particle attract itself?

I.e. does it work like (mapcar (lambda (X) (gravity X Xs)) Xs) or X should be excluded from Xs, before gravity applies?

>>23

maybe if you try to model something with math some time, you'll understand why certain models are more appropriate in certain situations. And you know, actually try to obtain some meaningful results. Don't just set it up the way you think everything should be set up and then assume that it'll work out because it fits into the way that you think things should be.