Brillouin's theorem
= Brillouin's theorem
{c}
At Hartree-Fock stationarity, $\langle\Phi_0|H|\Phi_i^a\rangle=0$ for each occupied-virtual single excitation.
= Brillouin's theorem
{c}
At Hartree-Fock stationarity, $\langle\Phi_0|H|\Phi_i^a\rangle=0$ for each occupied-virtual single excitation.