diff --git a/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md
index 0a7c0dc04..79bea3243 100644
--- a/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md
+++ b/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md
@@ -3,6 +3,19 @@ title : electrostatics-in-matter-main
 published : false
 visible : false
 ---
+
+Equations de maxwell
+
+$`div \overrightarrow{E} = \dfrac{\rho}{\epsilon_0}`$
+
+$`\overrightarrow{rot} \;\overrightarrow{E} = 0`$
+
+$`div \overrightarrow{B} = 0`$
+
+$`\overrightarrow{rot} \;\overrightarrow{B} = \mu_0\;\overrightarrow{j} +
+\mu_0 \epsilon_0 \;\dfrac{\partial \overrightarrow{j}}{\partial t}`$
+
+
 $`\overrightarrow{rot}\,\overrightarrow{E}=-\dfrac{\partial \overrightarrow{B}}{\partial t}`$
 
 $`\overrightarrow{rot} \, \left( \overrightarrow{rot}\,\overrightarrow{E} \right)=