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The subroutine NINE


\begin{displaymath}
\left\{
\begin{array}{ccc}
J1/2 & J2/2 & J3/2 \\
L1/2 & L2/2 & L3/2 \\
K1/2 & K2/2 & K3/2
\end{array}\right\}.
\end{displaymath} (33)

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