From 5cb985f47d09dbc77b45547c1fb43755c32282cc Mon Sep 17 00:00:00 2001
From: Claude Meny <claude.meny@irap.omp.eu>
Date: Tue, 1 Sep 2020 12:35:20 +0200
Subject: [PATCH] Update textbook.fr.md

---
 .../04.reference-frames-coordinate-systems/textbook.fr.md   | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md
index d229bc017..61dda240a 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md
@@ -339,9 +339,9 @@ Do we keep the same letter (S or A) to speak of both the surface and its area?
 Or do we separate the concepts? <br>
 If A is the area of a surface S, Which is the most logical and esay to understand for students
 among the following entries? <br>
-<br>$`dA=\iint_A dA`$ <br>
-$`dS=\iint_S dS`$ <br>
-$`dA=\iint_S dA`$ <br>
+<br>$`A=\iint_A dA`$ <br>
+$`S=\iint_S dS`$ <br>
+$`A=\iint_S dA`$ <br>
 
 [ES] Tenemos que elegir de forma independiente para cada idioma, entre estas notaciones :<br>
 [FR] Nous devons choisir de façon indépendante pour chaque langue, entre ces notations :<br>