[Ipopt] sparse matrix additions

[John Pye]

Hi Rodrigo

You might be interested to see if any of the following include code for
what you need. You might want to have a dig around the 'mtx' code in
ASCEND too, since it comes from the same CMU corridors...

http://ascendwiki.cheme.cmu.edu/Survey_of_sparse_matrix_software
http://ascendwiki.cheme.cmu.edu/Mtx

Please feel free anyone to add other sparse codes to this list, if you
know of some that are missing.

Cheers
JP

Rodrigo Lopez-Negrete wrote:
> Dear all,
>
> I'm using the C++ interface of Ipopt, and I'm wondering if any of you
> out there have suggestions for codes that will allow me to do fast
> sparse matrix additions using the triplet format used in Ipopt. I've
> seen some codes that use compressed row or column formats, but I'm not
> using those conventions. For now, I'm trying to not change my code
> that much. I need this to add the Hessian of the objective function
> with the Hessian of the constraints, among others. 
>
> Any suggestions will be appreciated.
>
> Thanks,
>  Rodrigo
>
> -- 
>
> *Rodrigo López-Negrete de la Fuente*
> Doctoral Candidate 
> Email: rln at cmu.edu <mailto:rln at cmu.edu>
> WWW: http://rodrigo.lopez-negrete.org <http://rodrigo.lopez-negrete.org/>
>
> Department of Chemical Engineering
> Carnegie Mellon University 
> 5000 Forbes Ave. 
> Pittsburgh, PA 15213-3890
> USA
>
>
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-- 
Dr John Pye
Dept of Engineering
Australian National University