diff --git a/report.tex b/report.tex
index ce09a41..e4a8802 100644
--- a/report.tex
+++ b/report.tex
@@ -271,7 +271,7 @@
         0 & 0 & 0 \\
         0 & 0 & -1 \\
         0 & -1 & 0
-      \end{pmatrix}.
+      \end{pmatrix} \qc S=0
     \end{equation}
   \end{frame}