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Mathematical methods in classical mechanics, classical and quantum field theory, quantum mechanics, statistical mechanics, condensed matter, nuclear and atomic physics.
101
votes
1
answer
8k
views
Dropping three bodies
Consider the usual three-body problem with Newtonian
$1/r^2$ force between masses. Let the three masses start off at rest,
and not collinear. Then they will become collinear a finite time late …
7
votes
1
answer
590
views
Spinor space to Euc. vector space: does there exist a universal bilinear map?
Let $S$ be a spin representation of the Euclidean
spin group $Spin(d)$ and let ${\mathbb R}^d$
be Euclidean $d$-space with $Spin(d)$ action on it
in the canonical way, via the 2:1 cover to $SO(d)$.
…