Body Perturbation Theory Versus Symmetry

Many-Body Perturbation Theory Versus Symmetry-Adapted Perturbation Theory 

The results from the foregoing studies are in contradiction with the results of Yang and Kestner. However, the methodology used by the latter group has not been proven faulty rather, the results differ because the later workers used smaller basis sets, partly on purpose, because they wanted to find some overcorrections. Moreover, the two studies were carried out with different sets of basis functions, so that a one-to-one comparison is unjustified. Gutowski and Chalasinski stress the fact that their results were obtained with large basis 

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