HESSIAN _ _ _ _ _ _ _ _ _ _ _ _ operator
<expr> :- a scalar expression.
<variable\_list> :- either a single variable or a list of variables.
hessiancomputes the hessian matrix of <expr> w.r.t. the variables in <variable\_list>.
This is an n by n matrix where n is the number of variables and the (i,j)'th entry is df(<expr>,<variable\_list>(i), <variable\_list>(j)).
hessian(x*y*z+x^2,{w,x,y,z}); [0 0 0 0] [ ] [0 2 z y] [ ] [0 z 0 x] [ ] [0 y x 0]
Related functions: df.