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

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

@@ -13,7 +13,8 @@ lessons:
       name: PARALLELE : from corpuscules and waves to wave-corpuscular duality
       order: 2
 ---
-
+$`\newcommand{\dpt}[1]{\overset{\large\bullet}{#1}}`$   
+$`\newcommand{\ddpt}[1]{\overset{\large\bullet\bullet}{#1}}`$   
 
 *Cours en construction*, **non validé**.    
 ![](https://m3p2.com/fr/temporary_ins/images/M3P2-validity-state-FR_L1200.jpg)   
@@ -39,7 +40,7 @@ lessons:
 
 ---------------------------
 
-### Les ondes
+### L'onde et la description de sa propagation
 
 <br>