3The last term of the Hamiltonian in equation (2.16) describes the Coulomb interactions between nuclei. With respect to the electronic system, it yields a constant contribution, which has been left out in this derivation for simplicity.
of the Hamiltonian in equation (2.16) describes the Coulomb interactions
between nuclei. With respect to the electronic system, it yields a constant contribution, which has
been left out in this derivation for simplicity.