The behavior of the off-diagonal Fock matrix elements of Boys-localized Hartree-Fock orbitals is studied versus the spatial separation of the localized orbitals. A universal upper bound in terms of appropriately defined vicinity quantities was found, which shows that the largest Fock matrix elements
On the transferability of Fock matrix elements
โ Scribed by Brian J. Duke; Brian O'Leary
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 889 KB
- Volume
- 62
- Category
- Article
- ISSN
- 1432-2234
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
The non-diagonal matrix elements in the adiabatic Born-Oppenheimer approximation are considered. The effect of the Q-dependence of the electronic energy denominator is calculated explicitly for an arbitrary initial and final state. It is shown that the inclusion of this effect does not change the re
An extrapolation method based on the ek-transformation 1s applied to matrix Hartree-Fock calculations on the water and formaldehyde molecules. For water the two-electron energy is presented at each iteration for calculations with and without extrapolation. Results are also given to demonstrate the e