 
 
 
laplacian takes two arguments : an 
expression F of n real variables and a vector of these variable names.
laplacian returns the Laplacian ofF, that is the sum of all second
partial derivatives, for example in dimension n=3:
| ∇2(F)= | 
 | + | 
 | + | 
 | 
Example
Find the Laplacian of F(x,y,z)=2x2y−xz3.
Input :
^2*y-x*z^3,[x,y,z])Output :
 
 
