yes, sure!

By the way, GLPK has a CVXOPT interface, so this would also means that
this interface
needs to be somehow taken care of in a new release of CVXOPT package,
that I hopefully
will be able to deal with in July...

Dima


On Jun 21, 8:02 pm, Robert Miller <r...@rlmiller.org> wrote:
> Hello,
>
> Almost a year ago there was a brief discussion about this topic:
>
> http://groups.google.com/group/sage-devel/browse_thread/thread/fed15c...
>
> GLPK is a GPLv3 program from the FSF for linear programming:
>
> http://www.gnu.org/software/glpk/
>
> Many of the awesome graph theory functions (such as for Hamiltonian
> graphs) depend on some LP program being installed, and I think it
> would be great if sage-standard could, e.g. solve the is_hamiltonian
> question. Here are a few William Stein quotes from the last
> discussion:
>
>
>
> > NOTE: GLPK is GPLv3.  Since we need to retain the ability to release GPLv2
> > versions of Sage for now, this is another very good reason to make it
> > optional for a while (so it is easy to swap out).
> ...
> > I personally think GLPK will end up being standard in Sage before
> > long, so I think your approach right now is pretty good.   It's just
> > that it has to be optional for a bit (a month or so), since that's
> > what we do.
>
> I recently emailed him about the GPLv3 issue, asking "is GPLv3 a
> deal-breaker?" and he replied "No, it is not a dealbreaker."
>
> As more and more functions requiring LP get merged into Sage, I think
> the time has come to reconsider this.
>
> --
> Robert L. Millerhttp://www.rlmiller.org/

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