diff --git a/Slides/SRG-GF.tex b/Slides/SRG-GF.tex
index 5228d1b..9660ac8 100644
--- a/Slides/SRG-GF.tex
+++ b/Slides/SRG-GF.tex
@@ -58,10 +58,10 @@
     	\begin{equation}
 	     	\left.
 			\begin{array}{cc}
-    		\qty[ \bF + \bSig_c(\om) ] \bpsi = \om \bpsi
+    		\qty[ \bF + \bSig(\om) ] \bpsi = \om \bpsi
 			\\
 			\\
-			\bSig_c(\om) = \bV \qty(\om \bI - \bC)^{-1} \bV^{\dag} 
+			\bSig(\om) = \bV \qty(\om \bI - \bC)^{-1} \bV^{\dag} 
 			\end{array}
 			\right\}
 			\qq{$\xleftrightharpoons[upfolding]{downfolding}$}