[Ipopt] Ipopt Digest, Vol 98, Issue 19
Sylvain Auliac
auliac at ann.jussieu.fr
Tue Feb 26 07:53:13 EST 2013
Hello,
There is also an interface for IPOPT in our open source software
FreeFem++ (http://www.freefem.org/ff++/index.htm). The software is designed
for solving EDP by the finite elements method, but it can also be used
for some other tasks. It has its own language which is nearly a subset
of c with some features of its own. Though, the call to IPOPT is
simplified and you don't have to play with the c++ part.
I don't know what are exactly the non-linear system you're playing with,
but you can visit the web page our feel free to ask me any question to
see if it could fit your needs.
Best regards,
Sylvain
On 26/02/2013 02:33, Gaspar Núñez wrote:
> thank you very much Antonello y Novalio,
>
> the problem is not that i don't like gams
> but that it's expensive, and i´m looking for an alternative
> for students and researchers that can´t afford it
> (as a matter of fact i don't see the point in developing
> a free ipopt if people can´t use it but paying to gams or others )
>
> anyhow, i wonder if someone has tried to do something
> like what i´m looking for: a free open source readily usable
> to solve large systems of equations with ipopt
> so that one could work on a hands on example
>
> cheers
>
> gaspar
>
>
> ------------------------------------------------------------------------
> *From:* "ipopt-request at list.coin-or.org"
> <ipopt-request at list.coin-or.org>
> *To:* ipopt at list.coin-or.org
> *Sent:* Monday, February 25, 2013 11:00 AM
> *Subject:* Ipopt Digest, Vol 98, Issue 19
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> Today's Topics:
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> 1. help to use ipopt (Gaspar N??ez)
> 2. Re: help to use ipopt (Antonello Lobianco)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 24 Feb 2013 18:07:13 -0800 (PST)
> From: Gaspar N??ez <nuroga at yahoo.com <mailto:nuroga at yahoo.com>>
> To: "ipopt at list.coin-or.org <mailto:ipopt at list.coin-or.org>"
> <ipopt at list.coin-or.org <mailto:ipopt at list.coin-or.org>>
> Subject: [Ipopt] help to use ipopt
> Message-ID:
> <1361758033.55580.YahooMailNeo at web162306.mail.bf1.yahoo.com
> <mailto:1361758033.55580.YahooMailNeo at web162306.mail.bf1.yahoo.com>>
> Content-Type: text/plain; charset="iso-8859-1"
>
> hi
>
> i?m an economist and
>
> i?ve been using ipopt with GAMS
> to solve large squared nonlinear systems of equations
>
> but i'd like not to use GAMS anymore
> but some free open source software or interface
>
> i will very much appreciate every piece of help
> to do this in the easiest possible way
> using a programming language similar to that of GAMS if possible
>
> since i?m not a programmer and not an expert on implementing
> algorithms
>
> thankyou very much
>
> gaspar
>
> on
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> ------------------------------
>
> Message: 2
> Date: Mon, 25 Feb 2013 09:27:25 +0100
> From: Antonello Lobianco <antonello at lobianco.org
> <mailto:antonello at lobianco.org>>
> To: Gaspar N??ez <nuroga at yahoo.com <mailto:nuroga at yahoo.com>>
> Cc: "ipopt at list.coin-or.org <mailto:ipopt at list.coin-or.org>"
> <ipopt at list.coin-or.org <mailto:ipopt at list.coin-or.org>>
> Subject: Re: [Ipopt] help to use ipopt
> Message-ID:
>
> <CAOibvJEt7oSnfsZkVAOkbvHCk-Wx6g5Yh9YJNqHnR3O2qWyysA at mail.gmail.com <mailto:CAOibvJEt7oSnfsZkVAOkbvHCk-Wx6g5Yh9YJNqHnR3O2qWyysA at mail.gmail.com>>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Ipopt is the solver engine, GAMS is the interface that let you use
> such
> engine (and many others) from an high-level point of view.
> If you don't like gams, you can try other interfaces to ipopt or
> to other
> solver engines.
>
> If you are looking for open source, you may want give a try to
> Pyomo or
> OpenOpt, but they are not documented so extensively like GAMS or AMPL.
>
> Antonello
>
> 2013/2/25 Gaspar N??ez <nuroga at yahoo.com <mailto:nuroga at yahoo.com>>
>
> > hi
> >
> > i?m an economist and
> > i?ve been using ipopt with GAMS
> > to solve large squared nonlinear systems of equations
> >
> > but i'd like not to use GAMS anymore
> > but some free open source software or interface
> >
> > i will very much appreciate every piece of help
> > to do this in the easiest possible way
> > using a programming language similar to that of GAMS if possible
> > since i?m not a programmer and not an expert on implementing
> algorithms
> >
> > thankyou very much
> >
> > gaspar
> > on
> >
> >
> > _______________________________________________
> > Ipopt mailing list
> > Ipopt at list.coin-or.org <mailto:Ipopt at list.coin-or.org>
> > http://list.coin-or.org/mailman/listinfo/ipopt
> >
> >
>
>
> --
> Antonello Lobianco
> INRA, Laboratoire d'Economie Foresti?re
> 14 Rue Girardet - 54000 Nancy, France
> Tel: +33.652392310
> Email: antonello.lobianco at nancy-engref.inra.fr
> <mailto:antonello.lobianco at nancy-engref.inra.fr>
> http://antonello.lobianco.org
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