diff --git a/presentation/Rational_Homotopy_Theory.tex b/presentation/Rational_Homotopy_Theory.tex
index 6a1c7b1..e516d0a 100644
--- a/presentation/Rational_Homotopy_Theory.tex
+++ b/presentation/Rational_Homotopy_Theory.tex
@@ -203,7 +203,7 @@
 
 	\bigskip
 	\bf cdga $n$-simplex
-	\[ \Delta_n = \frac{\Lambda(x_0, \ldots x_n, dx_0, \ldots, dx_n)}{\langle \sum x_i - 1, \sum dx_i \rangle} \]
+	\[ \Delta_n = \frac{\Lambda(x_0, \ldots x_n, dx_0, \ldots, dx_n)}{\langle \sum x_i - 1, \sum dx_i \rangle}, \quad \deg{x_i}=0 \]
 }
 
 \Frame{Construction}{