Update cheatsheet.fr.md

12.temporary_ins/41.classical-analytical-mechanics/40.classical-hamiltonian-mechanics/20.hamiltonian-mechanics-application/05.hamiltonian-mechanics-method/20.overview/cheatsheet.fr.md

@@ -11,6 +11,8 @@ lessons:
 ---
 
 <!--caligraphie de l'intégrale double curviligne-->
+$`\newcommand{\dpt}[1]{\overset{\large\bullet}{#1}}`$   
+$`\newcommand{\ddpt}[1]{\overset{\large\bullet\bullet}{#1}}`$   
 $`\def\dens{\large{\varrho}\normalsize}`$
 $`\def\oiint{\displaystyle\mathop{{\iint}\mkern-18mu \scriptsize \bigcirc}}`$
 $`\def\Loiint{\displaystyle\mathop{{\iint}\mkern-22mu \scriptsize \bigcirc}}`$