Newly Discovered “Reset Button” Lets Mathematicians Undo Any RotationImagine closing your eyes and rolling a billiards ball across a table. Where it goes; what angles it hits the sides at; how much it spins or swerves – all that is, for our purposes, basically random. And then, imagine you’re asked to roll it back to exactly its starting point. Could you do it?The rest of this article is behind...
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