CASSCF CASPT2(v) CASPT(c-v) INDO/S CASSI INDO/S... [Pg.318]

To set up a size-extensive perturbation theory, the zero-order Hamiltonian must be additively separable. We shall here show that, for multiplicatively separable zero-order wave functions, the CASSCF Fock operator and the zero-order energy are both additively separable but that the presence of projection operators nevertheless makes the zero-order CASPT Hamiltonian H ... [Pg.276]

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