GSoC tasks for OO further development

hi all,
my GSoC 2007 mentor Alan G Isaac recommends to specify in my proposition which tasks from OO TODO list and/or beyond the one are intended to be done during GSoC 2008. So if you have a feature request(s) and/or other OpenOpt enhancement proposition(s) they can be considered to be appended to the list as well till student application deadline (March 31).

constraints handling for NLSP solver nssolve

I'm glad to inform that NLSP solver nssolve now can handle all types of constraints; user-supplied derivatives to f, c, h can be handled as well.

See NLSP constrained example.

Also, a small bugfix for nssolve iprint parameter handling has been made.

However, currently graphic output for constrained NLSP does not work properly yet, it's intended to be fixed in future.

Connecting IPOPT, Part 1

a Ph.D. student from Washington University has informed me, that he spent just a single day and already has working Python-IPOPT connection (of course, it requires some more time to make it appropriate enough). That one is implemented via Python's C-API, but maybe in future numpy's C-API or something else will be used.

Unfortunately, I still have some problems with build, for me it yields "/usr/lib/libipopt.so.0: undefined symbol: _gfortran_concat_string".
You could take a look at the code by yourself, the one is available here

You must have IPOPT installed (I have tried 3.3.1 and 3.3.5, note that this one requires LP solver installed such as MUMPS); modify links to IPOPT directories in batch.sh and run the file (note that for now the code is usable in Linux only).

paypal does not allow payments to Ukraine

I have been informed that paypal link from OO page refuses to make donation to OpenOpt, because paypal does not allow payments to Ukraine. So I will try to find another approach. Ideas or leads are very welcome.
(Last edit: 2008/04/16 09:39 by Dmitrey)

ALGENCAN connection bugfix

I have fixed a bug in ALGENCAN <-> openopt connection.
svn and tarball from OO install page have been updated.

to openopt users

hi all,

I decided to create a list of openopt users, similar to T0M0PT's one (i.e. that one mentioned in OO start page)

could anyone provide some info like the one from here?

It would increase openopt's chances for obtaining participation in GSoC 2008 (students propositions start soon, some days later) or mb an other one.

Regards,
Dmitrey.

mb CVXOPT will include glpk milp solver

I have contacted CVXOPT developers (Lieven Vandenberghe, Joachim Dahl) about implementing glpk milp solver available in CVXOPT (since they already have glpk lp solver connected).
They have answered: maybe next CVXOPT version will include connection to glpk milp solver (then it will be connected to OO as well).