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The subroutine has the input arguments J1, J2, J3,
L1, L2, L3, K1, K2, K3,
I and output arguments IN and AA.
If the parameter I=1, the subroutine only checks the triangular conditions
of a 9j- coefficient. If these are not satisfied, then IN=0,
and IN=1
otherwise. At other values of I, the subroutine calculates the value of
9j- coefficient and assigns it to the output parameter AA.
2001-12-07