Update textbook.fr.md

12.temporary_ins/20.magnetostatics-vacuum/40.ampere-theorem-applications/05.ampere-symetries-invariances/10.main/textbook.fr.md

@@ -195,10 +195,10 @@ Si de plus la distribution de courants $`\overrightarrow{j}`$ est invariante par
 $`\mathbf{\Longrightarrow \overrightarrow{j} = \overrightarrow{j} (\beta)\Longrightarrow \overrightarrow{B}=\overrightarrow{B}\,(\beta)}`$**
 
 **$`\require{cancel}\begin{align}\left.
-\begin{align}
-&\overrightarrow{j}\,(\xcancel{\alpha},\beta, \gamma) =\overrightarrow{j}\,(\beta,\gamma) \\
-&\overrightarrow{j}\,(\alpha,\beta, \xcancel{\gamma}) =\overrightarrow{j}\,(\alpha,\beta)
-\end{align}\right\}&\Longrightarrow \overrightarrow{j} = \overrightarrow{j} (\beta)\\
+\begin{array}{l}
+\overrightarrow{j}\,(\xcancel{\alpha},\beta, \gamma) =\overrightarrow{j}\,(\beta,\gamma) \\
+\overrightarrow{j}\,(\alpha,\beta, \xcancel{\gamma}) =\overrightarrow{j}\,(\alpha,\beta)
+\end{array}\right\}&\Longrightarrow \overrightarrow{j} = \overrightarrow{j} (\beta)\\
 &\Longrightarrow \overrightarrow{B}=\overrightarrow{B}\,(\beta)
 \end{align}`$**