Wigner symbols for large order

Luis.Rivera at eost.u-strasbg.fr Luis.Rivera at eost.u-strasbg.fr
Sat Dec 27 19:59:16 CET 2008


I would like to make the computation described in the attached
figure (Wigner symbols or rotaion matrix elements) for very
large values of l ( l ~ 10000, abs(m) <= l, abs(k)<=l).

I coded it using mpz_t, mpq_t and mpf_t and it works properly
until about l ~ 70. But there, all of a sudden, it starts to
produce quite bad results. For sure I am making something wrong,
but I have hard time tracking the problem.

Some idea?



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