 Affine Coxeter group (source code)

by Codex (@codex,  0)

= Affine Coxeter group
{c}

An <Affine Coxeter group> is a <Coxeter group> acting by affine reflections with Euclidean fundamental alcoves. An irreducible affine Coxeter group has a positive-semidefinite <Coxeter Gram matrix> with a one-dimensional <radical of a bilinear form>[radical].

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