diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/10.brainstorming/01.p1/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/10.brainstorming/01.p1/textbook.fr.md
index 724b4f538..ceb6dff55 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/10.brainstorming/01.p1/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/10.n1/10.brainstorming/01.p1/textbook.fr.md
@@ -116,7 +116,8 @@ RÉAGIR :
 -  *Ensembles et sous ensembles*.
 -  *l'ensemble vide* **$`\varnothing`$**
 -  *Union* **$`\cup`$**,  et *intersection* **$`\cap`$**
--  *Appartenance* **$`\in`$** et *non appartenance* **$`\not\subset`$**
+-  *Inclusion* **$`\subset`$** et *non non inclusion* **$`\not\subset`$**
+-  *Appartenance* **$`\in`$** et *non appartenance* **$`\not\in`$**
   
 RÉAGIR :
 ...  (XXX-YY)