minor modifs on t2's modifs on the effective operator

JCTC_revision/GW-srDFT.tex

@@ -483,7 +483,7 @@ where, in the case of a single-determinant method (such as HF and KS-DFT),}
 \end{equation}
 and 
 \begin{equation}
-	\n{2}{\Bas}(\br{}) = n_{\uparrow}^{\Bas}(\br{}) n_{\downarrow}^{\Bas}(\br{}')
+	\n{2}{\Bas}(\br{},\br{}') = n_{\uparrow}^{\Bas}(\br{}) n_{\downarrow}^{\Bas}(\br{}')
 \end{equation}
 is the opposite-spin pair density in a closed-shell system.