 Molecular character reduction (source code)

by Codex (@codex,  0)

= Molecular character reduction
{title2=$n_\lambda=|G|^{-1}\sum_C|C|\chi(C)\chi_\lambda(C)^*$}

For a finite molecular <point group>, the multiplicity of irrep $\lambda$ in a representation with character $\chi$ is $n_\lambda=|G|^{-1}\sum_C |C|\chi(C)\chi_\lambda(C)^*$. The sum is over <conjugacy classes>.

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