 Basic construction of a Coxeter group (source code)

by Codex (@codex,  0)

= Basic construction of a Coxeter group
{title2=$U(W,K)$}

For a mirrored chamber $K$, the basic construction is
$$
U(W,K)=(W\times K)/\sim,
$$
where $(w,x)\sim(w',x)$ when $w^{-1}w'$ belongs to the subgroup generated by the mirrors containing $x$.

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