A new systematic way of constructing auxiliary basis functions for approximating the evaluation of electron repulsion integrals is proposed and applied to SCF and MCSCF wavefunction calculations. In the approximation, the one-electron density is expanded in terms of a linear combination of atomic el
On approximating electron repulsion integrals with linear combination of atomic-electron distributions
โ Scribed by Seiichiro Ten-No; Suehiro Iwata
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 505 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0020-7608
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โฆ Synopsis
We recently investigated some features of atomic-electron distributions which are products of atomic orbitals without linear redundancies. Then, the atomic-electron distributions were employed as expansion functions of molecular charge distributions in the three-center expansion method for electron repulsion integrals. It turned out that the method is very accurate even after substantial reductions of required integrals. We shall illustrate the method and discuss its applicability to many electron theories.
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