Update cheatsheet.fr.md

12.temporary_ins/08.conservative-vector-fields/20.conservative-vector-fields-properties/20.overview/cheatsheet.fr.md

@@ -510,6 +510,7 @@ x* La **circulation de la force conservative** s'exerçant sur un corpuscule de
 $`\begin{align}
 \displaystyle\color{brown}{\large{\mathbf{\displaystyle\int_A^B\overrightarrow{F}_X\cdot\overrightarrow{dl}}}} & =\int_A^B \alpha\,\overrightarrow{X}\cdot\overrightarrow{dl}\\
 & =\int_A^B \alpha\,\big(-\,\overrightarrow{grad}\,\phi_X\big) \cdot\overrightarrow{dl} \\
+& =-\displaystyle\,\int_A^B \alpha\,\underbrace{\big(\overrightarrow{grad}\,\phi_X\cdot\overrightarrow{dl}\big)}_{=\;d\phi\;,\text{ dfn de } \overrightarrow{grad}\,\phi}\\
 & =-\,\int_A^B \alpha\;d\phi_X \\
 & =-\,\int_A^B \mathcal{E}_X^{pot} \\
 \\
@@ -517,10 +518,7 @@ $`\begin{align}
 \\
 & \color{blue}{\large{\mathbf{\;=-\;\overset{B}{\underset{A}{\Large{\Delta}}}(\mathcal{E}_X^{pot})}}}\\
 \end{align}`$
-<br>
-$`=-\displaystyle\,\int_A^B \alpha\,\big(\underbrace{\overrightarrow{grad}\,\phi_X\cdot\overrightarrow{dl}}_{=\;d\phi\;,\text{ dfn de } \overrightarrow{grad}\,\phi}\big)`$
-<br>
-$`=-\displaystyle\,\int_A^B \alpha\,\underbrace{\big(\overrightarrow{grad}\,\phi_X\cdot\overrightarrow{dl}\big)}_{=\;d\phi\;,\text{ dfn de } \overrightarrow{grad}\,\phi}`$
+
 
 
 #### Qu'est-ce que la circulation d'un champ vectoriel le long d'un chemin ?