Update topic.en.md

5 years ago · 7965a87d5f
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--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/04.paraxial-optics-centered-systems/topic.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/05.paraxial-optics/04.paraxial-optics-centered-systems/topic.en.md
@ -1,4 +1,6 @@
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 title: 'Paraxial modeling of centered optical systems'
+published: false
+visible: false
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