[Ipopt] hessian option

Brad Bell bradbell at seanet.com
Mon May 11 10:29:19 EDT 2009

Is it possible to convert you evaluation of the energy function to C++ ? 
If so, you may be able to use algorithmic differentiation to compute 
your gradients and Hessians; see
Take a look at the simple representation example

Sourav Rakshit wrote:
> Hi all,
> I am new to ipopt and trying to use it for energy minimization in protein
> structure prediction. Unfortunately, my function is very complex and
> calculating gradient and hessian analytically involves a lot of work ;
> specially hessian calculation is almost impossible for me. I am working
> with ma27 solver...i tried mumps but it fails. Unfortunately, IPOPT is not
> able to converge for my problem. Can I increase the performance of IPOPT
> by suitable options? Till now i have no constraints in my problem and I am
> not providing the hessian.
> sincerely,
> Sourav Rakshit

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