New efficient programs to calculate general recoupling coefficients. Part II: Evaluation of a summation formula

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Abstract

In Comput. Phys. Commun. 83 (1994) 275, we described a program NJFORMULA to generate a summation formula in terms of 6-j coefficients for a general angular momentum recoupling coefficient. Here we 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. We 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. © 1995.

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Fack, V., Pitre, S. N., & Van der Jeugt, J. (1995). New efficient programs to calculate general recoupling coefficients. Part II: Evaluation of a summation formula. Computer Physics Communications, 86(1–2), 105–122. https://doi.org/10.1016/0010-4655(94)00179-6

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