The method was developed by the group of William A. Goddard, III around 1970.
[1][2] The generalized Coulson–Fischer theory for the hydrogen molecule, discussed in Modern valence bond theory, is used to describe every electron pair in a molecule.
The orbitals for each electron pair are expanded in terms of the full basis set and are non-orthogonal.
GVB code in some programs, particularly GAMESS (US), can also be used to do a variety of restricted open-shell Hartree–Fock calculations,[3] such as those with one or three electrons in two pi-electron molecular orbitals while retaining the degeneracy of the orbitals.
You can help Wikipedia by expanding it.This quantum chemistry-related article is a stub.