<div dir="ltr">You may want to post the error measures from the sedumi solve. You can get them by setting pars.errors=1.<div>Imre</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jul 21, 2015 at 12:00 PM, <span dir="ltr"><<a href="mailto:csdp-request@list.coin-or.org" target="_blank">csdp-request@list.coin-or.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send Csdp mailing list submissions to<br>
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Today's Topics:<br>
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1. comparison of CSDP and SeDumi (Dehghanpoor, Golnoosh)<br>
2. Re: comparison of CSDP and SeDumi (Brian Borchers)<br>
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Message: 1<br>
Date: Mon, 20 Jul 2015 20:26:28 +0000<br>
From: "Dehghanpoor, Golnoosh" <<a href="mailto:g.dehghanpoor@wustl.edu">g.dehghanpoor@wustl.edu</a>><br>
To: "<a href="mailto:csdp@list.coin-or.org">csdp@list.coin-or.org</a>" <<a href="mailto:csdp@list.coin-or.org">csdp@list.coin-or.org</a>><br>
Subject: [Csdp] comparison of CSDP and SeDumi<br>
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Hi,<br>
<br>
<br>
I'm trying to solve a SDP problem with CSDP (from gloptipoly package) , which I've previously run with SeDumi and have gotten answer. But CSDP finds the same problem infeasible. Do you know what might be causing the problem? (I had to change [0 nsdpblocks+1 i i -c(i)] to full([0 nsdpblocks+1 i i -c(i)]) in fprintf in writedspa function to get the code working). Thanks for your time.<br>
<br>
<br>
Regards,<br>
<br>
Golnoosh<br>
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Message: 2<br>
Date: Mon, 20 Jul 2015 18:50:18 -0600<br>
From: Brian Borchers <<a href="mailto:borchers@nmt.edu">borchers@nmt.edu</a>><br>
To: "Dehghanpoor, Golnoosh" <<a href="mailto:g.dehghanpoor@wustl.edu">g.dehghanpoor@wustl.edu</a>><br>
Cc: "<a href="mailto:csdp@list.coin-or.org">csdp@list.coin-or.org</a>" <<a href="mailto:csdp@list.coin-or.org">csdp@list.coin-or.org</a>><br>
Subject: Re: [Csdp] comparison of CSDP and SeDumi<br>
Message-ID:<br>
<CAE-H=HSPw6Hd2QpZi9WMfyuk91=<a href="mailto:C2SZc5tv_JDwrdjJVT6wMyQ@mail.gmail.com">C2SZc5tv_JDwrdjJVT6wMyQ@mail.gmail.com</a>><br>
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Without seeing the problem, I can't give any sort of complete answer to<br>
this question.<br>
<br>
One common issue is that SeDuMi has different requirements for feasibility<br>
than the other primal-dual interior point codes in that it will allow<br>
either the X or Z variable to have slightly negative eigenvalues, while<br>
CSDP, SDPT3, and SDPA all require that these variables have Cholesky<br>
factorizations. There are many badly posed problems that are right on the<br>
edge of feasibility with respect to this issue.<br>
<br>
<br>
On Mon, Jul 20, 2015 at 2:26 PM, Dehghanpoor, Golnoosh <<br>
<a href="mailto:g.dehghanpoor@wustl.edu">g.dehghanpoor@wustl.edu</a>> wrote:<br>
<br>
> Hi,<br>
><br>
><br>
> I'm trying to solve a SDP problem with CSDP (from gloptipoly package) ,<br>
> which I've previously run with SeDumi and have gotten answer. But CSDP<br>
> finds the same problem infeasible. Do you know what might be causing the<br>
> problem? (I had to change [0 nsdpblocks+1 i i -c(i)] to full([0<br>
> nsdpblocks+1 i i -c(i)]) in fprintf in writedspa function to get the code<br>
> working). Thanks for your time.<br>
><br>
><br>
> Regards,<br>
> Golnoosh<br>
><br>
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<br>
--<br>
Brian Borchers <a href="mailto:borchers@nmt.edu">borchers@nmt.edu</a><br>
Department of Mathematics <a href="http://www.nmt.edu/~borchers/" rel="noreferrer" target="_blank">http://www.nmt.edu/~borchers/</a><br>
New Mexico Tech Phone: <a href="tel:%28575%29%20322-2592" value="+15753222592">(575) 322-2592</a><br>
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End of Csdp Digest, Vol 32, Issue 3<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><a href="http://imre.polik.net" target="_blank">http://imre.polik.net</a></div>
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