Modeling the potential of a charge distribution

PMW Gill, BG Johnson, JA Pople… - The Journal of chemical …, 1992 - pubs.aip.org
(Throughout this Letter, unless otherwise noted, we will follow the convention that integrals
are over all space.) Minimizing Eq.(3) subject to Eq.(4), however, poses some irritating …

More efficient method for the basis transformation of electron interaction integrals

KC Tang, C Edmiston - The Journal of Chemical Physics, 1970 - pubs.aip.org
This result for MA can further be slightly reduced by finding only those transformed integrals
for which m> p or m= p and n⩾ q. This saves roughly half the MA of the second‐half …

Coulombic potential energy integrals and approximations

JL Whitten - The Journal of Chemical Physics, 1973 - pubs.aip.org
Theorems are derived which establish a method of approximating two‐particle Coulombic
potential energy integrals,[φ a (1) r 12− 1| φ b (2)], in terms of approximate charge densities …

Use of Electron Repulsion Integral Approximations in Molecular Quantum Mechanics

RS Barker, H Eyring, CJ Thorne… - The Journal of Chemical …, 1954 - pubs.aip.org
Straightforward theoretical calculation for molecular systems using eigenfunctions built up
from atomic orbitals and employing actual and approximate methods for the evaluation of …

Ab initio methods for large systems

I Panas, J Almlöf, MW Feyereisen - International journal of …, 1991 - Wiley Online Library
Methods for calculations on extended systems are proposed, in which long‐range
Coulombic interactions are treated classically. The basic mode of description for the system …

Two-electron integrations in the quantum theory of atoms in molecules

AM Pendás, MA Blanco, E Francisco - The Journal of chemical physics, 2004 - pubs.aip.org
A method to compute two-electron integrals over arbitrary regions of space is introduced and
particularized to the basins appearing in the quantum theory of atoms in molecules. The …

Inequalities for electron repulsion integrals

JD Power, RM Pitzer - Chemical Physics Letters, 1974 - Elsevier
We derive a number of inequalities which must be satisfied by the interelectron repulsion
integral occurring in quantum mechanical calculations. These inequalities are valide for any …

Some Extraordinary Functions for Improving Calculations of Electronic Energies

LC Snyder, RG Parr - The Journal of Chemical Physics, 1958 - pubs.aip.org
10 Five years ago, Dr. R. Pariser (unpublished work) suggested that a rationalization of the
low electronic repulsion integrals in the Pariser· Parr semiempirical pi-electron theory,] …

[引用][C] VLAM, a program for computing the electron-molecule static interaction potential from a Legendre expansion of the molecular charge density

GB Schmid, DW Norcross, LA Collins - Computer Physics Communications, 1980 - Elsevier
, & (r1,..., rne)= bound ne~ eCtro11molecular wave The electron—molecule static interaction
potential function, is of central importance to calculations of cross sections forelectron …

[PDF][PDF] Comment on" Analysis of some integrals arising in the atomic four-electron problem"[J. Chem. Phys. 99, 3622 (1993)]

FE Harris, AM Frolov, VH Smith - Journal of Chemical Physics, 2004 - academia.edu
In a seminal paper in this journal, King has published a detailed discussion of atomic
integrals containing explicit rij factors, entitled ''Analysis of some integrals arising in the …