From 826ba2208700e05194aa4309b89552ed00793d8b Mon Sep 17 00:00:00 2001
From: Claude Meny <claude.meny@irap.omp.eu>
Date: Sun, 30 Aug 2020 10:28:46 +0200
Subject: [PATCH] Update textbook.fr.md

---
 .../textbook.fr.md                                | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 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 33ff8b65d..9666bcd15 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
@@ -286,16 +286,15 @@ a path that connects these two points without crossing the surface. Example: the
 of a sheet of paper. (to be submitted to mathematicians). <br>
 
 * **N3 ($`\rightarrow`$ N4)**<br>
-[ES] Cálculo integral del área $`A`$ de una superficie cerrada macroscópica $`S_{\cerc}`$ :<br>
-[FR] Calcul intégral de l'aire $`A`$ d'une surface fermée $`S_{\cerc}`$ macroscopique :<br>
-[EN] Integral calculus of the area $`A`$ of a macroscopic closed surface $`S_{\cerc}`$ :<br>
-$`A=\oint_{S} dA`$<br>
+[ES] Cálculo integral del área $`A`$ de una superficie cerrada macroscópica $`S_{\circ}`$ :<br>
+[FR] Calcul intégral de l'aire $`A`$ d'une surface fermée $`S_{\circ}`$ macroscopique :<br>
+[EN] Integral calculus of the area $`A`$ of a macroscopic closed surface $`S_{\circ}`$ :<br>
+$`A=\oint_{S\circ} dA`$<br>
 [ES] Cálculo integral del área $`A`$ de una superficie abierta macroscópica $`S_{\smallsmile}`$ :<br>
-[FR] Calcul intégral de l'aire $`A`$ d'une surface ouverte $`S_{ouverte}`$ macroscopique :<br>
-[EN] Integral calculus of the area $`A`$ of a macroscopic open surface $`A_{open}`$ :<br>
-$`A=\int_{Scer.} dA`$<br>
+[FR] Calcul intégral de l'aire $`A`$ d'une surface ouverte $`S_{\smallsmile}`$ macroscopique :<br>
+[EN] Integral calculus of the area $`A`$ of a macroscopic open surface $`A_{\smallsmile}`$ :<br>
+$`A=\int_{S\smallsmile} dA`$<br>
 
-1 &#9675; 2 U+25CB
 
 
 ### Coordenadas cilíndricas / Coordonnées cylindriques / Cylindrical coordinates (N3-N4)