<div dir="ltr">Ipopt is able to solve unconstrained problems. It will not be able to solve your problem though, because it is unbounded. Consider x2 = 1, x1 --> -infinity</div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Oct 11, 2014 at 10:46 AM, header intact <span dir="ltr"><<a href="mailto:13791153313@163.com" target="_blank">13791153313@163.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><p> Hi, everybody:<br> Now I am learning the IPOPT software, Now I have a question. the docs give an example of NLP with<br> constraint function. However, if the problem has only object function, it does not has constraint function,<br> can IPOPT solve it? for example, I want to get the optimal solution for minf(x)=x1*x2+25*x2*x2,but it does not have<br> any constraint function. How can I set Hession information etc?<br> Best Regards.<br> Yours<br> Kaiyan Pan </p></div><br><br><span title="neteasefooter"><span><div><div style="border-top:#cccccc 1px solid;padding:10px 5px;font-size:12px;color:#666;line-height:22px">来自网易手机号码邮箱<a href="http://shouji.163.com" style="color:#0000ff" target="_blank">了解更多</a></div></div>
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