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

[Ayotte-Sauvé, Étienne]

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.

Regards,

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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