diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/04.paraxial-optics-centered-systems/06.course-level-down/page.fr.md b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/04.paraxial-optics-centered-systems/06.course-level-down/page.fr.md
index f3b1ebb60..7d17b4874 100644
--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/04.paraxial-optics-centered-systems/06.course-level-down/page.fr.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/04.paraxial-optics-centered-systems/06.course-level-down/page.fr.md
@@ -1,5 +1,7 @@
 ---
 title: 'cours : niveau-1'
+published: false
+visible: false
 ---
 
 cours : niveau-1