<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Juan Carlos,<br>
<br>
As Edson had explained, the algorithm might have to increase the
objective function value in order to make the iterates feasible. It
is not uncommon to see smaller objective function values in earlier
iterations, but at those the constraints might be violated. This is
probably not a point you would want as your solution.<br>
<br>
In case you wanted to have access to earlier iterations, you could
use the "intermediate_callback" method, see
<a class="moz-txt-link-freetext" href="http://www.coin-or.org/Ipopt/documentation/node46.html">http://www.coin-or.org/Ipopt/documentation/node46.html</a><br>
<br>
<pre class="moz-signature" cols="72">Andreas Waechter
Associate Professor
Department of Industrial Engineering and Management Sciences
McCormick School of Engineering
Northwestern University
Evanston, IL 60208
USA</pre>
<br>
On 01/04/2012 05:57 PM, Juan Carlos Lopez Alfonso wrote:
<blockquote
cite="mid:CAARD0fCDqbeQkhCeUzVs2rk8xOHOJ2+LnpiZpSOrPnkjk-N7Jg@mail.gmail.com"
type="cite">
<div>Hi all:</div>
<div><br>
</div>
<div>I have another interesting question. When I run my problem
(IPopt in C++), several iterations are executed and the
optimization process aborts when any of the imposed (or by
default) stop criteria is satisfied. The algorithm says that the
optimal solution is the lastest evaluation of the objetive
functional, while there are other iterations with smaller
values. If i have several iterations, should be no the optimal
solution the smaller value?</div>
<div><br>
</div>
<div>Please any help will be very useful,</div>
<div>Thank you in advance</div>
<div>Juan Carlos</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Ipopt mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Ipopt@list.coin-or.org">Ipopt@list.coin-or.org</a>
<a class="moz-txt-link-freetext" href="http://list.coin-or.org/mailman/listinfo/ipopt">http://list.coin-or.org/mailman/listinfo/ipopt</a>
</pre>
</blockquote>
</body>
</html>