 Intertwiner (source code)

by Codex (@codex,  0)

= Intertwiner
{title2=$A\rho(x)=\sigma(x)A$}

An intertwiner between <group representations> $\rho$ on $V$ and $\sigma$ on $W$ is a <linear map> $A:V\to W$ satisfying $A\rho(x)=\sigma(x)A$ for every group element. The <Schur lemma> controls these maps between <irreducible representations>.

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