# Revision history [back]

### evaluation of hessian in some point

hi this code works very well but i can not manage to make Sagemaths evaluate the matrix H in the critical points : this is the two lines with f

from sage.manifolds.operators import *
E.<x,y> = EuclideanSpace()
f(x,y)=exp(-y^2)+x^4-x^2
F = E.scalar_field(f)
show("3) f",f)