mod_rotgll Module

It calculates all the elements of the Green Function of the impurity cluster using the GF calculated for the representative pairs. The representative pair and the symmetry operation D are given through the arrays IJTABSH and IJTABSYM set up in SHELLGEN2K() $$\begin{equation} G^{nm,n'm'}_{L,L'}(E)=\sum_{L_1,L_2} D_{L,L_1}^T G_{L_1,L_2}^{nm,n'm'}(E) D_{L_2,L'} \end{equation}$$ where $$\begin{equation} DR^n_m=R^n_m \end{equation}$$ and $$\begin{equation} DR^{n'}_m=R^{n'}_m \end{equation}$$