Update cheatsheet.fr.md

12.temporary_ins/04-math-tools/70.systems-of-differential-equations/40.parallel-1/cheatsheet.fr.md

@@ -67,7 +67,7 @@ $`= \begin{pmatrix} \lambda_1 & 0 & 0 \\ 0 & \ddots & 0 \\ 0 & 0 & \lambda_m\\ \
 
 Et par récurrence,
 
-$`\forall k \in \mathbb{N}^{*}\{1}`$  <!--\setminus -->
+$`\forall k \in \mathbb{N}^{*}\setminus\{1\}`$  <!--\setminus -->
 
 **$`\mathbf{M^k}`$** $`\; = M^{k-1}\times M`$
 
@@ -78,11 +78,9 @@ $`\quad = \begin{pmatrix} \lambda_1^{k-1} & 0 & 0 \\ 0 & \ddots & 0 \\ 0 & 0 & \
 
 ##### $`M`$ est non diagonale, mais diagonalisable`$
 
-<br>
-
 *$`\mathbf{M^2}`$* $`\; = M\times M`$
 
-$`\quad = P\,\begin{pmatrix} \lambda_1 & 0 & 0 \\ 0 & \ddots & 0 \\ 0 & 0 & \lambda_m\\ \end{pmatrix}\,\underbrace{P^{-1}\;\times\; 
+$`= P\,\begin{pmatrix} \lambda_1 & 0 & 0 \\ 0 & \ddots & 0 \\ 0 & 0 & \lambda_m\\ \end{pmatrix}\,\underbrace{P^{-1}\;\times\; 
 \; P}_{\color{blue}{= I_m}}\,\begin{pmatrix} \lambda_1 & 0 & 0 \\ 0 & \ddots & 0 \\ 0 & 0 & \lambda_m\\ \end{pmatrix}\,P^{-1}`$
 
 $`= P\,\begin{pmatrix} \lambda_1 & 0 & 0 \\ 0 & \ddots & 0 \\ 0 & 0 & \lambda_m \\ \end{pmatrix}^{\,2}`$