Commit b5814a28 authored by Claude Meny's avatar Claude Meny

Update 12.temporary_ins/69.waves/30.n3/20.overview/cheatsheet.fr.md

parent 98dd48d9
Pipeline #15533 failed with stage
......@@ -264,7 +264,7 @@ Liste des questions et figures à faire... dans le désordre ...
<br>
ou en écriture vectorielle (indépendante du système de coordonnées choisi) :
<br>
**$`\mathbf{\large{\Delta U}\normalsize{(x,t)}\large{\,-\,\dfrac{1}{\mathscr{v}}\cdot\dfrac{\partial^2 U\normalsize{(x,t)}}{\partial t^2}= 0}}`$**
**$`\mathbf{\large{\Delta U}\normalsize{(\vec{r},t)}\large{\,-\,\dfrac{1}{\mathscr{v}}\cdot\dfrac{\partial^2 U\normalsize{(\vec{r},t)}}{\partial t^2}= 0}}`$**
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