NJGRAF — An efficient program for calculation of general recoupling coefficients by graphical analysis, compatible with NJSYM
Description
Abstract NJGRAF calculates angular momentum recoupling coefficients by graphical methods. The results are sums of products of 6j coefficients. These can be evaluated several times with different values of the arguments. The number and the range of summation variables are minimal. It is intended to replace NJSYM, with a gain of computer time of up to two orders of magnitude. Title of program: NJGRAF Catalogue Id: ABBY_v1_0 Nature of problem This program calculates a general recoupling coefficient for an arbitrary number of integer or half-integer angular momenta. Versions of this program held in the CPC repository in Mendeley Data ABBY_v1_0; NJGRAF; 10.1016/0010-4655(88)90192-0 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)