SEARCH Articles Figures Tables Dirac equation Dirac-Fock Dirac-Fock equation Dirac-Hartree Dirac-Hartree-Fock Dirac-Hartree-Fock equations approximations Dirac-Hartree-Fock equations ground state Dirac-Hartree-Fock-Roothaan Matrix Equations Fock equations Hartree Fock equation Hartree equation Kramers-Restricted 2-Spinor Matrix Dirac-Hartree-Fock Equations Matrix Dirac-Hartree-Fock Equations in a 2-Spinor Basis