On 13 août, 12:26, Viny <hje...@hotmail.com> wrote:
> On 13 août, 10:47, Viny <hje...@hotmail.com> wrote:
>
> > Hi,
>
> > I have a problem of memory into maxima when it performs a symbolic
> > expression of an hessian matrix. This symbolic expression of the
> > hessian seems to be too big. My sage program is written using python.
> > And i want to compute the hessian matrix with mathematica 6.0 in my
> > sage file.
> > I need to compute symbolic expresstion of the gradient and the hessian
> > with mathematica and after compute the mathématica LinearSolve
> > function to solve hessian^-1*grad.
> > How to make this interface in my .sage?
> > Please help me!!!
>
> > I have mathematica 6.0 and sage4.0.2 in my linux 64bit system.
>
> This is an example of the function to compute the gradient in
> my .sage, but it doesn't work.
> def grad(f,v):
> return mathematica ( f ).D( [ ' v ',1] )
> The result is {0,0} . I have another problem of format, i don't know
> the command to change { } in () in the mathematica result {0,0}. Thank you
> for your help
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