Spin Properties of Pair-Correlated Atomic and Molecular Singlet Wavefunctions

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Abstract
The recent work of Sinanoğlu upon pair‐correlated wavefunctions is considered. We derive the conditions required for his wavefunction to be a spin singlet, and then relate these conditions to his theory. In particular, we show them to be satisfied to an approximation consistent with those used in deriving his ``exact pair'' theory. An error in the original integral breakdown is also pointed out and shown to have little effect on the results of the theory.