diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/01.geometrical-optics-general/01.geometrical-optics-validity/01.geometrical-optics-domain-of-validity-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/01.geometrical-optics-general/01.geometrical-optics-validity/01.geometrical-optics-domain-of-validity-main/textbook.en.md
index 13af3cdd8..51ca25afc 100644
--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/01.geometrical-optics-general/01.geometrical-optics-validity/01.geometrical-optics-domain-of-validity-main/textbook.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/01.geometrical-optics-general/01.geometrical-optics-validity/01.geometrical-optics-domain-of-validity-main/textbook.en.md
@@ -1,5 +1,7 @@
 ---
 title: 'Validity domain of geometric optics'
+published : false
+visible : false
 ---
 
 ###Domaine de validité de l'optique géométrique