New efficient programs to calculate general recoupling coefficients. II: Evaluation of a summation formula. In part I [ibid. 83, 275--292 (1994; Zbl 891.17002)], the authors described a program NJFORMULA to generate a summation formula in terms of 6-$j$ coefficients for a general angular momentum recoupling coefficient. Here they present programs for the second part of the problem, i.e. the numerical computation of a general recoupling coefficient by evaluating the formula generated by the program NJFORMULA. They describe a sequential version NJSUMMATION, written in C, which runs on a range of computers, as well as a parallel version NJSUMPAR, also written in (Parallel) C, which runs on an arbitrary network of transputers.
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References in zbMATH (referenced in 3 articles )
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- Fack, V.; Lievens, S.; Van der Jeugt, J.: On bounds for the rotation distance between binary coupling trees (1999)
- Fack, V.; Pitre, S.N.; Van der Jeugt, J.: Calculation of general recoupling coefficients using graphical methods (1997)
- Fack, V.; Pitre, S.N.; Van der Jeugt, J.: New efficient programs to calculate general recoupling coefficients. II: Evaluation of a summation formula (1995)