diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/30.n3/10.brainstorming/01.p1/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/30.n3/10.brainstorming/01.p1/textbook.fr.md
index 846f43eb3..2916f712e 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/30.n3/10.brainstorming/01.p1/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/30.n3/10.brainstorming/01.p1/textbook.fr.md
@@ -125,6 +125,8 @@ si $`q=p^n`$, alors $`\log_p(q)=n`$, où $`n,p,q`$ sont des entiers et $`p,q`$ p
 <!------------------------------------------------------------------------------
 MATRICES
 ------------------------------------------------------------------------------->
+! *Matrices carrés*
+
 $`\begin{matrix} a&b\\ c&d \end{matrix}`$      
 $`\begin{pmatrix} a&b\\ c&d \end{pmatrix}`$    
 $`\begin{vmatrix} a&b\\ c&d \end{vmatrix}`$