diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
index edcf6064b..f7b42ee26 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
@@ -408,7 +408,7 @@ $`\;\Longrightarrow\left|\begin{array}{l}\overrightarrow{U}\cdot\overrightarrow{
 ##### Producto escalar de dos vectores ortogonales /Produit scalaire de 2 vecteurs orthogonaux /
 
 "$`(\vec{e_1},\vec{e_2},...,\vec{e_n})`$ est une base de $`\mathcal{E}`$"
-$`\quad\Longrigtharrow`$
+$`\quad\Longrightarrow`$
 $`\quad\forall \overrightarrow{U}\in\mathcal{P}\quad \overrightarrow{U}=\sum_{i=1}^n\;U_i\cdot\vec{e_i}`$ 
 $`\quad\forall \overrightarrow{V}\in\mathcal{P}\quad \overrightarrow{U}=\sum_{i=1}^n\;V_i\cdot\vec{e_i}`$  
 $`\quad\overrightarrow{U}\cdot\overrightarrow{V}=U_1\,V_1 + U_2\,V_2 + ... + U_n\,V_n = \sum_{i=1}^n\;U_i\,V_i`$