[Ipopt] Start in positive area with optimal solution in negativearea

Ayotte-Sauvé, Étienne Etienne.Ayotte-Sauve at RNCan-NRCan.gc.ca
Fri Jan 20 09:12:00 EST 2012

Hi Michael,

Is it possible to define the context, namely what you mean by "structural topology optimizations" and "area"?

Apologies in advance if the context is obvious or has already been defined in a previous message.


Etienne Ayotte-Sauve  

-----Original Message-----
From: ipopt-bounces at list.coin-or.org [mailto:ipopt-bounces at list.coin-or.org] On Behalf Of "Michael Gißler"
Sent: January 20, 2012 8:50 AM
To: ipopt at list.coin-or.org
Subject: [Ipopt] Start in positive area with optimal solution in negativearea

Is it possible for IPOPT to optimize a NLP where the objective starts in a positive area but has it's optimum in negative one?

I try to run several structural topology optimizations which work quite well except that one special case.
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