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

  • Fack V
  • Pitre S
  • Van der Jeugt J
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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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