Update cheatsheet.fr.md

12.temporary_ins/08.grad-div-rot/70.combinaisons-of-operators/20.overview/cheatsheet.fr.md

@@ -80,9 +80,8 @@ $`\quad =
 
 $`\color{blue}{div\,\overrightarrow{U}=\dfrac{\partial U_x}{\partial x}+\dfrac{\partial U_y}{\partial y}+\dfrac{\partial U_z}{\partial z}}`$
 
-      La divergence d'un champ vectoriel est un champ scalaire.   
-      Le gradient d'un champ scalaire $`f`$ est le champ vectoriel,
-      qui s'exprime en coordonnées cartésiennes :
+   * La divergence d'un champ vectoriel est un champ scalaire.   
+     Le gradient d'un champ scalaire $`f`$ est le champ vectoriel, qui s'exprime en coordonnées cartésiennes :
 
 $`\overrightarrow{grad}\,f=\left(
 \begin{array}{l}
@@ -96,7 +95,7 @@ $`\overrightarrow{grad}\,f=\left(
 $`\overrightarrow{grad}\big(div\,\overrightarrow{U}\big)`$
 $`\quad = \left(
 \begin{array}{l}
-\dfrac{\partial}{\partial x}\left( \color{blue}{\dfrac{\partial U_x}{\partial x}} \right)\\
-\dfrac{\partial}{\partial y}\left( \color{blue}{\dfrac{\partial U_y}{\partial y}} \right)\\
-\dfrac{\partial}{\partial z}\left( \color{blue}{\dfrac{\partial U_z}{\partial z}} \right)
+\dfrac{\partial}{\partial x}\left( \color{blue}{\dfrac{\partial U_x}{\partial x}+\dfrac{\partial U_y}{\partial y}+\dfrac{\partial U_z}{\partial z}} \right)\\
+\dfrac{\partial}{\partial y}\left( \color{blue}{\dfrac{\partial U_x}{\partial x}+\dfrac{\partial U_y}{\partial y}+\dfrac{\partial U_z}{\partial z}} \right)\\
+\dfrac{\partial}{\partial z}\left( \color{blue}{\dfrac{\partial U_x}{\partial x}+\dfrac{\partial U_y}{\partial y}+\dfrac{\partial U_z}{\partial z}} \right)
 \end{array}\right)`$
\ No newline at end of file