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Vector processing algorithm for electron repulsion integrals in Ab Initio HF calculation based upon the PK supermatrix
Author(s) -
Yahiro Shuichi,
Gondo Yasuhiko
Publication year - 1992
Publication title -
journal of computational chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.907
H-Index - 188
eISSN - 1096-987X
pISSN - 0192-8651
DOI - 10.1002/jcc.540131008
Subject(s) - supermatrix , ab initio , computational chemistry , electron , ab initio quantum chemistry methods , physics , statistical physics , chemistry , algorithm , mathematics , quantum mechanics , algebra over a field , pure mathematics , molecule , current algebra , affine lie algebra
An efficient vector processing algorithm generating PK supermatrices has been developed, in particular aiming at calculations on large molecules. The algorithm utilizes the recurrence relations for electron repulsion integrals. The PK supermatrices are listed in a nearly canonical order so that the Fock matrix generation is efficiently vectorized, no temporary ERI and PK files being used. This is effected by partition of the basis set (atomic orbitals) into subsets of certain appropriate sizes, and the partition approach is named as the three‐dimensional partial space method. A high‐speed Hartree–Fock calculation including integrals and SCF procedures is achieved. © 1992 by John Wiley & Sons, Inc.