Finite-difference-steepest descent paradigm: new numerical method of Fockian spectral problem
... avoid the wavefuncions space and spin variables division, that leads to superposition in spin projection stacionary states. The approach is verified by comparison with conventional methods.
Kshevetskii S. P.
Hartree — Fock equation, Fockian, wavefunction, Hamiltonian, electron, exchange
90-103