Key points are not available for this paper at this time.
Following the pioneering work of Jurgens-Lutovsky and Almlöf Chem. Phys. Lett. 178, 451 (1991), a second-order Møller–Plesset program was developed which allows the use of a large basis set for the pair correlation functions and a more modest one for the self-consistent field (SCF) orbitals. For several test systems, correlation energies closely approximate the results of a large basis set calculation, at substantial savings. The SCF energy of the large basis set calculation can also be estimated using perturbation theory.
Woliński et al. (Thu,) studied this question.