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Update 12.temporary_ins/10.electrostatics-vacuum/40.gauss-theorem-applications/05.gauss-symetries-invariances/10.main/textbook.fr.md

12.temporary_ins/10.electrostatics-vacuum/40.gauss-theorem-applications/05.gauss-symetries-invariances/10.main/textbook.fr.md

@@ -151,7 +151,7 @@ Si de plus la distribution de charge $`\dens`$ est invariante par toute variatio
 
 **$`\mathbf{\left.\begin{array}{c}
 \dens\,(\xcancel{\alpha},\beta, \gamma) =\dens\,(\beta,\gamma) \\
-\dens\,(\alpha),\beta, \xcancel{\gamma}) =\dens\,(\alpha,\beta)
+\dens\,(\alpha,\beta, \xcancel{\gamma}) =\dens\,(\alpha,\beta)
 \end{array}
 \right\}}`$$`\mathbf{\Longrightarrow \dens = \dens (\beta)\Longrightarrow \overrightarrow{E}=\overrightarrow{E}\,(\beta)}`$**