Abstract
An exact wave function descn'bing the behavior of many-electron systems has not yet been found [1, 2], because the variables in the SchrSdinger equation may not be separated [3]. Therefore, it is important to develop effective numerical algorithms for seeking the solutions of the Schr&iinger equation [2, 4] primarily to calculate the total energies of the systems. However, at present, analytical expressions for the energies of many-electron systems are unavailable, except different approximations in perturbation theory or the variational method for two-electron systems [5]. To obtain an analytical function of the energy of a many-electron system, one can adopt a formal approach to using the Ge!lmann-Feynman theorem [6]
Published Version
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