Abstract
An intercomparison is given between different types of treatment of electron correlation. On the one hand one has the calculations of Clementi and others arising from accurate Hartree–Fock calculations on atoms and molecules, and their comparisons with the experimental energies. On the other hand, one has calculations of Wigner and Seita, Breuckner and others, on correlations in the free electron gas. It is pointed out that these do not seem consistent with each other. The advantage of describing the correlation in terms of a correlation hole is emphasized. It is recommended that concentrated orbitals be used in discussing correlation, as is being done by the molecular theorists.
Published Version
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