Del: diferenças entre revisões

 

===Em altas ordens===

 

:<math>\forall n,m \in \mathbb{N_*}\!^2 \quad D_n D_m f = D_n \left( D_m \, f \right) = \frac{\partial \left( \frac{\partial f}{\partial \vec x_m} \right) }{\partial \vec x_n} = \frac{\partial^2 f}{\partial \vec x_n \partial \vec x_m}</math>