Update cheatsheet.fr.md

12.temporary_ins/90.electromagnetism-in-vacuum/10.maxwell-equations/20.overview/cheatsheet.fr.md

@@ -694,7 +694,7 @@ $`\overrightarrow{rot} \, \left( \overrightarrow{rot}\,\overrightarrow{E} \right
 -\dfrac{\partial}{\partial t} \,\left(\mu_0\;\overrightarrow{j} +
 \mu_0 \epsilon_0 \;\dfrac{\partial \overrightarrow{E}}{\partial t}\right)`$
 <br><br>
-*$`\overrightarrow{rot} \, \left( \overrightarrow{rot}\,\overrightarrow{E} \right)=-\mu_0\;\dfrac{\partial \overrightarrow{j}}{\partial t}  +\mu_0 \epsilon_0 \;\dfrac{\partial^2 \overrightarrow{E}}{\partial t^2}`$*
+*$`\overrightarrow{rot} \, \left( \overrightarrow{rot}\,\overrightarrow{E} \right)=-\mu_0\;\dfrac{\partial \overrightarrow{j}}{\partial t}  - \mu_0 \epsilon_0 \;\dfrac{\partial^2 \overrightarrow{E}}{\partial t^2}`$*
 <br><br>
 
 * *$`\overrightarrow{grad} \left( div \; \overrightarrow{E} \right) = \overrightarrow{grad}\left( \dfrac{\dens}{\epsilon_O} \right)`$*