SIXJSYMBOL _ _ _ _ _ _ _ _ _ _ _ _ operator
The SixjSymbol operator implements the 6j symbol.
SixjSymbol(<list of j1,j2,j3>,<list of l1,l2,l3>)
SixjSymbol({7,6,3},{2,4,6}); 1 ------------- 14*sqrt(858)
The operator SixjSymbol uses the ineq package in order to find minima and maxima for the summation index.