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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Ted,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">It was coinor.dippy-1.92.3. If I run Romain’s script (RR_dippy.py) with the options below:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">dippy.Solve(prob, {</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'TolZero'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">:
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'%s'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"> % tol,</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'doPriceCut'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">:
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'%s'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"> %</span><span style="font-size:10.0pt;font-family:Consolas;color:maroon;mso-fareast-language:EN-US">1</span><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">,</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'CutCGL'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">:
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'1'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"> ,</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'doCut'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">:
</span><i><span style="font-size:10.0pt;font-family:Consolas;color:#C9802B;mso-fareast-language:EN-US">'1'</span></i><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"> ,</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"> </span><span style="font-size:10.0pt;font-family:Consolas;color:silver;mso-fareast-language:EN-US">#
'SolveMasterAsIp': '0',</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><span style="font-size:10.0pt;font-family:Consolas;color:silver;mso-fareast-language:EN-US"># 'generateInitVars': '1',</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><span style="font-size:10.0pt;font-family:Consolas;color:silver;mso-fareast-language:EN-US"># 'LogDebugLevel': 3,</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><span style="font-size:10.0pt;font-family:Consolas;color:silver;mso-fareast-language:EN-US"># 'LogDumpModel': 5,</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><span style="font-size:10.0pt;font-family:Consolas;color:silver;mso-fareast-language:EN-US"># 'ALPS' :</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">
</span><span style="font-size:10.0pt;font-family:Consolas;color:silver;mso-fareast-language:EN-US"># {'msgLevel' : 3}</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"> })<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">I get a segmentation fault:</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:red;mso-fareast-language:EN-US">Fatal Python error: (pygame parachute) Segmentation Fault</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:red;mso-fareast-language:EN-US">This application has requested the Runtime to terminate it in an unusual way.</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:red;mso-fareast-language:EN-US">Please contact the application's support team for more information.</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></a></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">If I just use doCut (comment out the doPriceCut line) I have no problem and get:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">Alps0208I Search completed.</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">Alps0261I Best solution found had quality -390.56173 and was found at depth 17<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">If I just use doPriceCut (comment out the doCut line) I have no problem and get:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">Alps0208I Search completed.</span><span style="font-size:10.0pt;font-family:Consolas;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">Alps0261I Best solution found had quality -390.56173 and was found at depth 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">So no problem with different objective function values, but maybe the actual solution is wrong? I can’t find the email where you explain the Cbc
issue sorry.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">I installed Dippy from scratch, so I must be using Cbc? Note that this is the 32-bit version.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black;mso-fareast-language:EN-US">I hope this helps, Mike<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Ted Ralphs [mailto:ted@lehigh.edu]
<br>
<b>Sent:</b> Wednesday, 8 March 2017 8:48 a.m.<br>
<b>To:</b> Michael O'Sullivan <michael.osullivan@auckland.ac.nz><br>
<b>Cc:</b> Romain Montagne <r.montagne@hotmail.fr>; dip@coin-or.org<br>
<b>Subject:</b> Re: [Dip] [FORGED] Dip Digest, Vol 44, Issue 3<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Mike, which version of Dippy were you using? Same as Romain or a recent one? I thought we had fixed the problem with having both settings active at once in the latest versions.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">In any case, the problem that is not the seg fault, but that DIP gets the wrong solution on this particular instance with Cbc as the underlying MIP solver. With SYMPHONY as the underlying solver, everything seems fine. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Cheers,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Ted <o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Tue, Mar 7, 2017 at 8:55 AM, Michael O'Sullivan <<a href="mailto:michael.osullivan@auckland.ac.nz" target="_blank">michael.osullivan@auckland.ac.nz</a>> wrote:<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<p class="MsoNormal">Hi Romain,<br>
<br>
I got this working. I get a segmentation fault if I run it as is (you instance name is wrong by the way). Howevre, if I run with either just the doCut or the doPriceCut options enabled it runs fine. I'm guessing DIP gets confused if you try to use both those
options at once. What do you think Ted?<br>
<br>
So either<br>
<br>
dippy.Solve(prob, {<br>
'TolZero': '%s' % tol,<br>
# 'doPriceCut': '%s' %1,<br>
'CutCGL': '1' ,<br>
'doCut': '1' ,<br>
<br>
# 'SolveMasterAsIp': '0',<br>
# 'generateInitVars': '1',<br>
# 'LogDebugLevel': 3,<br>
# 'LogDumpModel': 5,<br>
# 'ALPS' :<br>
# {'msgLevel' : 3}<br>
})<br>
<br>
for branch-and-cut or<br>
<br>
dippy.Solve(prob, {<br>
'TolZero': '%s' % tol,<br>
'doPriceCut': '%s' %1,<br>
'CutCGL': '1' ,<br>
# 'doCut': '1' ,<br>
<br>
# 'SolveMasterAsIp': '0',<br>
# 'generateInitVars': '1',<br>
# 'LogDebugLevel': 3,<br>
# 'LogDumpModel': 5,<br>
# 'ALPS' :<br>
# {'msgLevel' : 3}<br>
})<br>
<br>
for branch, cut, and price.<br>
<br>
Thanks, Mike<br>
<br>
-----Original Message-----<br>
From: Romain Montagne [mailto:<a href="mailto:r.montagne@hotmail.fr">r.montagne@hotmail.fr</a>]<br>
Sent: Tuesday, 28 February 2017 8:06 a.m.<br>
To: Michael O'Sullivan <<a href="mailto:michael.osullivan@auckland.ac.nz">michael.osullivan@auckland.ac.nz</a>><br>
Cc: <a href="mailto:dip@coin-or.org">dip@coin-or.org</a><br>
Subject: Re: [Dip] [FORGED] Dip Digest, Vol 44, Issue 3<br>
<br>
Hello Mike and Ted,<br>
<br>
Sorry to bother you. Just wanted to know if you managed to run the python scripts.<br>
<br>
Thank you for your time and help, always appreciated!<br>
<br>
Romain<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><br>
<br>
> Le 17 févr. 2017 à 18:45, Michael O'Sullivan <<a href="mailto:michael.osullivan@auckland.ac.nz">michael.osullivan@auckland.ac.nz</a>> a écrit :<br>
><br>
> Hi Romain,<br>
><br>
> If you send through the Python file(s) that create the dippy.DipProblem I can take a look from a Dippy perspective too.<br>
><br>
> Thanks, Mike<br>
><br>
>> On 18/02/2017, at 3:51 AM, "<a href="mailto:dip-request@coin-or.org">dip-request@coin-or.org</a>" <<a href="mailto:dip-request@coin-or.org">dip-request@coin-or.org</a>> wrote:<br>
>><br>
>> Send Dip mailing list submissions to<br>
>> <a href="mailto:dip@list.coin-or.org">dip@list.coin-or.org</a><br>
>><br>
>> To subscribe or unsubscribe via the World Wide Web, visit<br>
>><br>
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https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.or</a><br>
>> g_mailman_listinfo_dip&d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxW<br>
>> PA_2Wlc4&r=9jaw7Wd-6mEsLj8M5sB-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-C<br>
>> eFlEkw6v6lST8C3JW6sUaNToiFlJFro&s=acd50ax2AqfCsE4GVYm-8JSKY4FtgK5BEvx<br>
>> L3B9vo7I&e= or, via email, send a message with subject or body 'help'<br>
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>> When replying, please edit your Subject line so it is more specific<br>
>> than "Re: Contents of Dip digest..."<br>
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>><br>
>> Today's Topics:<br>
>><br>
>> 1. Re: Dippy says problem is infeasible (Romain Montagn?) 2. Re:<br>
>> Dippy says problem is infeasible (Ted Ralphs) 3. Re: Dippy says<br>
>> problem is infeasible (Romain Montagn?)<br>
>><br>
>><br>
>> ---------------------------------------------------------------------<br>
>> -<br>
>><br>
>> Message: 1<br>
>> Date: Thu, 16 Feb 2017 14:04:37 -0500<br>
>> From: Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>><br>
>> To: Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>><br>
>> Cc: dip <<a href="mailto:dip@list.coin-or.org">dip@list.coin-or.org</a>><br>
>> Subject: Re: [Dip] Dippy says problem is infeasible<br>
>> Message-ID: <<a href="mailto:7A9C6D29-DC6F-48D0-8C69-A22A6DEBC82D@polymtl.ca">7A9C6D29-DC6F-48D0-8C69-A22A6DEBC82D@polymtl.ca</a>><br>
>> Content-Type: text/plain; charset="utf-8"<br>
>><br>
>> Hello Ted,<br>
>><br>
>> I am using DIP as a generic solver. I have simply created a dippy.DipProblem that I solve with and without the doPriceCut option, like in the examples that are provided.<br>
>><br>
>> I have attached 4 files:<br>
>><br>
>> - LP.lp is the .lp file<br>
>> - LP_blocks.txt is the block file<br>
>> - DoPriceCut0_terminal_output.txt is what I see on my screen when I<br>
>> solve the problem without the doPriceCut option (and it works fine)<br>
>> - DoPriceCut1_terminal_output.txt is what I see on my screen when I<br>
>> solve it with the doPriceCut option (and it tells me problem<br>
>> infeasible)<br>
>><br>
>> The version of DIP that I am using is 1.4.8. I work on a linux 64 bit machine, and my compiler is gcc, version 4.4.7.<br>
>><br>
>> If you need other information please let me know.<br>
>><br>
>> Thank you very much for your help,<br>
>><br>
>> Romain<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>><br>
>><br>
>><br>
>>> Le 16 f?vr. 2017 ? 11:38, Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a> <mailto:<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>>> a ?crit :<br>
>>><br>
>>> Hi Romain,<br>
>>><br>
>>> Are you using DIP as a generic solver or have you built an application? Can you send the .lp file and the block file, as well as other information, such as version number, platform, compiler, etc.? I would like to try and replicate this.<br>
>>><br>
>>> Cheers,<br>
>>><br>
>>> Ted<br>
>>><br>
>>> On Thu, Feb 9, 2017 at 6:36 PM, Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a> <mailto:<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>>> wrote:<br>
>>> PS: After saying the problem is infeasible, I get the following error: "Segmentation fault (core dumped)"<br>
>>><br>
>>><br>
>>>> Le 9 f?vr. 2017 ? 17:45, Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a> <mailto:<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>>> a ?crit :<br>
>>>><br>
>>>> Hello DIP community,<br>
>>>><br>
>>>> I am using Dippy to solve a MILP. I want to compare branch-and-bound and branch-and-price performances.<br>
>>>><br>
>>>> When I solve the problem with branch-and-bound (i.e., with the option ?doPriceCut? set to 0), it works great. But when I activate the ?doPriceCut? option for branch-and-price, it tells me the problem is infeasible.<br>
>>>><br>
>>>> Does anyone know what is happening?<br>
>>>><br>
>>>> I have looked at the .lp file as well as the block file and they look ok.<br>
>>>><br>
>>>> Any help is greatly appreciated.<br>
>>>><br>
>>>> Cheers,<br>
>>>><br>
>>>> Romain Montagn?, PhD<br>
>>><br>
>>><br>
>>> _______________________________________________<br>
>>> Dip mailing list<br>
>>> <a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a> <mailto:<a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a>><br>
>>> <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o" target="_blank">
https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o</a><br>
>>> rg_mailman_listinfo_dip&d=CwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogL<br>
>>> xWPA_2Wlc4&r=rnUB298ByR5BGgo6vv2b6g&m=SQ6EyINjMS0JVGwJJandNupwBLGNKe<br>
>>> 61En7rTWKugOY&s=-XIQIHlDQ8zaq0_-XbJ7Y9UA_fut5QgegRRy2uMeO1k&e=<br>
>>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor</a>.<br>
>>> org_mailman_listinfo_dip&d=CwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5og<br>
>>> LxWPA_2Wlc4&r=rnUB298ByR5BGgo6vv2b6g&m=SQ6EyINjMS0JVGwJJandNupwBLGNK<br>
>>> e61En7rTWKugOY&s=-XIQIHlDQ8zaq0_-XbJ7Y9UA_fut5QgegRRy2uMeO1k&e=><br>
>>><br>
>>><br>
>>><br>
>>> --<br>
>>> Dr. Ted Ralphs<br>
>>> Visiting Researcher, Zuse Institute Berlin Professor, Lehigh<br>
>>> University<br>
>>> (610) 628-1280<br>
>>> ted 'at' lehigh 'dot' edu<br>
>>> <a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
>>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__coral.ie.lehigh" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__coral.ie.lehigh</a><br>
>>> .edu_-7Eted&d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r<br>
>>> =9jaw7Wd-6mEsLj8M5sB-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw6v6<br>
>>> lST8C3JW6sUaNToiFlJFro&s=WkE3kfeZsAqiGAv4PqAvuTWrEz9tG3_xWgUBf0BineA<br>
>>> &e= ><br>
>><br>
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>> URL:<br>
>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o</a><br>
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<p class="MsoNormal">>> ToiFlJFro&s=ROn-E-BlSfpEzOZCoEvcSDXb1KK4rE68_vppDxNBiYI&e= ><br>
>><br>
>> ------------------------------<br>
>><br>
>> Message: 2<br>
>> Date: Thu, 16 Feb 2017 16:59:22 -0500<br>
>> From: Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>><br>
>> To: Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>><br>
>> Cc: dip <<a href="mailto:dip@list.coin-or.org">dip@list.coin-or.org</a>><br>
>> Subject: Re: [Dip] Dippy says problem is infeasible<br>
>> Message-ID:<br>
>><br>
>> <<a href="mailto:CA%2BGYycs9KH03eeXVxo_jB_Qt3XMkdH3BSEdUWE_S_K3Oh_rCVg@mail.gmail.com">CA+GYycs9KH03eeXVxo_jB_Qt3XMkdH3BSEdUWE_S_K3Oh_rCVg@mail.gmail.com</a>><br>
>> Content-Type: text/plain; charset="utf-8"<br>
>><br>
>> Hi Romain,<br>
>><br>
>> What's the version of DipPy you are using? How are you reading the<br>
>> problem into DipPy? Are you able to share the Python script you're using?<br>
>><br>
>> Cheers,<br>
>><br>
>> Ted<br>
>><br>
>><br>
>><br>
>> On Thu, Feb 16, 2017 at 2:04 PM, Romain Montagn?<br>
>> <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a><br>
>>> wrote:<br>
>><br>
>>> Hello Ted,<br>
>>><br>
>>> I am using DIP as a generic solver. I have simply created a<br>
>>> dippy.DipProblem that I solve with and without the doPriceCut<br>
>>> option, like in the examples that are provided.<br>
>>><br>
>>> I have attached 4 files:<br>
>>><br>
>>> - LP.lp is the .lp file<br>
>>> - LP_blocks.txt is the block file<br>
>>> - DoPriceCut0_terminal_output.txt is what I see on my screen when I<br>
>>> solve the problem without the doPriceCut option (and it works fine)<br>
>>> - DoPriceCut1_terminal_output.txt is what I see on my screen when I<br>
>>> solve it with the doPriceCut option (and it tells me problem<br>
>>> infeasible)<br>
>>><br>
>>> The version of DIP that I am using is 1.4.8. I work on a linux 64<br>
>>> bit machine, and my compiler is gcc, version 4.4.7.<br>
>>><br>
>>> If you need other information please let me know.<br>
>>><br>
>>> Thank you very much for your help,<br>
>>><br>
>>> Romain<br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>> Le 16 f?vr. 2017 ? 11:38, Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>> a ?crit :<br>
>>><br>
>>> Hi Romain,<br>
>>><br>
>>> Are you using DIP as a generic solver or have you built an application?<br>
>>> Can you send the .lp file and the block file, as well as other<br>
>>> information, such as version number, platform, compiler, etc.? I<br>
>>> would like to try and replicate this.<br>
>>><br>
>>> Cheers,<br>
>>><br>
>>> Ted<br>
>>><br>
>>> On Thu, Feb 9, 2017 at 6:36 PM, Romain Montagn? <<br>
>>> <a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>> wrote:<br>
>>><br>
>>>> PS: After saying the problem is infeasible, I get the following<br>
>>>> error: "Segmentation fault (core dumped)"<br>
>>>><br>
>>>><br>
>>>> Le 9 f?vr. 2017 ? 17:45, Romain Montagn?<br>
>>>> <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>> a ?crit :<br>
>>>><br>
>>>> Hello DIP community,<br>
>>>><br>
>>>> I am using Dippy to solve a MILP. I want to compare<br>
>>>> branch-and-bound and branch-and-price performances.<br>
>>>><br>
>>>> When I solve the problem with branch-and-bound (i.e., with the<br>
>>>> option ?doPriceCut? set to 0), it works great. But when I activate<br>
>>>> the ?doPriceCut? option for branch-and-price, it tells me the<br>
>>>> problem is infeasible.<br>
>>>><br>
>>>> Does anyone know what is happening?<br>
>>>><br>
>>>> I have looked at the .lp file as well as the block file and they look ok.<br>
>>>><br>
>>>> Any help is greatly appreciated.<br>
>>>><br>
>>>> Cheers,<br>
>>>><br>
>>>> Romain Montagn?, PhD<br>
>>>><br>
>>>><br>
>>>><br>
>>>> _______________________________________________<br>
>>>> Dip mailing list<br>
>>>> <a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a><br>
>>>> <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coi" target="_blank">
https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coi</a><br>
>>>> n-2Dor.org_mailman_listinfo_dip&d=CwICAg&c=Ngd-ta5yRYsqeUs<br>
>>>> EDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=rnUB298ByR5BGgo6vv2b6g&m=SQ6<br>
>>>> EyINjMS0JVGwJJandNupwBLGNKe61En7rTWKugOY&s=-XIQIHlDQ8zaq0_-<br>
>>>> XbJ7Y9UA_fut5QgegRRy2uMeO1k&e=<br>
>>>><br>
>>><br>
>>><br>
>>><br>
>>> --<br>
>>> Dr. Ted Ralphs<br>
>>> Visiting Researcher, Zuse Institute Berlin Professor, Lehigh<br>
>>> University<br>
>>> (610) 628-1280<br>
>>> ted 'at' lehigh 'dot' edu<br>
>>> <a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
>>><br>
>>><br>
>>><br>
>>><br>
>><br>
>><br>
>> --<br>
>> Dr. Ted Ralphs<br>
>> Visiting Researcher, Zuse Institute Berlin Professor, Lehigh<br>
>> University<br>
>> <a href="tel:%28610%29%20628-1280">(610) 628-1280</a><br>
>> ted 'at' lehigh 'dot' edu<br>
>> <a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
>> -------------- next part -------------- An HTML attachment was<br>
>> scrubbed...<br>
>> URL:<br>
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>> rg_pipermail_dip_attachments_20170216_b85dc143_attachment-2D0001.html<br>
>> &d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=9jaw7Wd-6mE<br>
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>> ToiFlJFro&s=4MoTC-wWm0zmP-jPGJ3Sy820upr1CwYvR0KHT1okTDM&e= ><br>
>><br>
>> ------------------------------<br>
>><br>
>> Message: 3<br>
>> Date: Thu, 16 Feb 2017 17:24:38 -0500<br>
>> From: Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>><br>
>> To: Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>><br>
>> Cc: dip <<a href="mailto:dip@list.coin-or.org">dip@list.coin-or.org</a>><br>
>> Subject: Re: [Dip] Dippy says problem is infeasible<br>
>> Message-ID: <<a href="mailto:4DA1977A-10CD-490B-993F-857811E79DED@polymtl.ca">4DA1977A-10CD-490B-993F-857811E79DED@polymtl.ca</a>><br>
>> Content-Type: text/plain; charset="utf-8"<br>
>><br>
>> I am using DipPy version 1.9.8. I will gladly share my scripts with you. All you have to do is adjust your path at the top of the RR_dippy.py so that it locates the file of Instances.<br>
>><br>
>> Also, in the script I use the NetworkX module, you might have to download it.<br>
>><br>
>> Let me know if I forgot something.<br>
>><br>
>> Thanks!<br>
>><br>
>><br>
>><br>
>>> Le 16 f?vr. 2017 ? 16:59, Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>> a ?crit :<br>
>>><br>
>>> Hi Romain,<br>
>>><br>
>>> What's the version of DipPy you are using? How are you reading the problem into DipPy? Are you able to share the Python script you're using?<br>
>>><br>
>>> Cheers,<br>
>>><br>
>>> Ted<br>
>>><br>
>>><br>
>>><br>
>>> On Thu, Feb 16, 2017 at 2:04 PM, Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a> <mailto:<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>>> wrote:<br>
>>> Hello Ted,<br>
>>><br>
>>> I am using DIP as a generic solver. I have simply created a dippy.DipProblem that I solve with and without the doPriceCut option, like in the examples that are provided.<br>
>>><br>
>>> I have attached 4 files:<br>
>>><br>
>>> - LP.lp is the .lp file<br>
>>> - LP_blocks.txt is the block file<br>
>>> - DoPriceCut0_terminal_output.txt is what I see on my screen when I<br>
>>> solve the problem without the doPriceCut option (and it works fine)<br>
>>> - DoPriceCut1_terminal_output.txt is what I see on my screen when I<br>
>>> solve it with the doPriceCut option (and it tells me problem<br>
>>> infeasible)<br>
>>><br>
>>> The version of DIP that I am using is 1.4.8. I work on a linux 64 bit machine, and my compiler is gcc, version 4.4.7.<br>
>>><br>
>>> If you need other information please let me know.<br>
>>><br>
>>> Thank you very much for your help,<br>
>>><br>
>>> Romain<br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>>> Le 16 f?vr. 2017 ? 11:38, Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a> <mailto:<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>>> a ?crit :<br>
>>>><br>
>>>> Hi Romain,<br>
>>>><br>
>>>> Are you using DIP as a generic solver or have you built an application? Can you send the .lp file and the block file, as well as other information, such as version number, platform, compiler, etc.? I would like to try and replicate this.<br>
>>>><br>
>>>> Cheers,<br>
>>>><br>
>>>> Ted<br>
>>>><br>
>>>> On Thu, Feb 9, 2017 at 6:36 PM, Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a> <mailto:<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>>> wrote:<br>
>>>> PS: After saying the problem is infeasible, I get the following error: "Segmentation fault (core dumped)"<br>
>>>><br>
>>>><br>
>>>>> Le 9 f?vr. 2017 ? 17:45, Romain Montagn? <<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a> <mailto:<a href="mailto:romain.montagne@polymtl.ca">romain.montagne@polymtl.ca</a>>> a ?crit :<br>
>>>>><br>
>>>>> Hello DIP community,<br>
>>>>><br>
>>>>> I am using Dippy to solve a MILP. I want to compare branch-and-bound and branch-and-price performances.<br>
>>>>><br>
>>>>> When I solve the problem with branch-and-bound (i.e., with the option ?doPriceCut? set to 0), it works great. But when I activate the ?doPriceCut? option for branch-and-price, it tells me the problem is infeasible.<br>
>>>>><br>
>>>>> Does anyone know what is happening?<br>
>>>>><br>
>>>>> I have looked at the .lp file as well as the block file and they look ok.<br>
>>>>><br>
>>>>> Any help is greatly appreciated.<br>
>>>>><br>
>>>>> Cheers,<br>
>>>>><br>
>>>>> Romain Montagn?, PhD<br>
>>>><br>
>>>><br>
>>>> _______________________________________________<br>
>>>> Dip mailing list<br>
>>>> <a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a> <mailto:<a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a>><br>
>>>> <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor" target="_blank">
https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor</a>.<br>
>>>> org_mailman_listinfo_dip&d=CwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5o<br>
>>>> gLxWPA_2Wlc4&r=rnUB298ByR5BGgo6vv2b6g&m=SQ6EyINjMS0JVGwJJandNupwBLG<br>
>>>> NKe61En7rTWKugOY&s=-XIQIHlDQ8zaq0_-XbJ7Y9UA_fut5QgegRRy2uMeO1k&e=<br>
>>>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor</a><br>
>>>> .org_mailman_listinfo_dip&d=CwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5<br>
>>>> ogLxWPA_2Wlc4&r=rnUB298ByR5BGgo6vv2b6g&m=SQ6EyINjMS0JVGwJJandNupwBL<br>
>>>> GNKe61En7rTWKugOY&s=-XIQIHlDQ8zaq0_-XbJ7Y9UA_fut5QgegRRy2uMeO1k&e=><br>
>>>><br>
>>>><br>
>>>><br>
>>>> --<br>
>>>> Dr. Ted Ralphs<br>
>>>> Visiting Researcher, Zuse Institute Berlin Professor, Lehigh<br>
>>>> University<br>
>>>> (610) 628-1280 <<a href="tel:(610)%20628-1280">tel:(610)%20628-1280</a>> ted 'at' lehigh 'dot' edu<br>
>>>> <a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
>>>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__coral.ie.lehig" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__coral.ie.lehig</a><br>
>>>> h.edu_-7Eted&d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4<br>
>>>> &r=9jaw7Wd-6mEsLj8M5sB-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw<br>
>>>> 6v6lST8C3JW6sUaNToiFlJFro&s=WkE3kfeZsAqiGAv4PqAvuTWrEz9tG3_xWgUBf0B<br>
>>>> ineA&e= ><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal">>>> --<br>
>>> Dr. Ted Ralphs<br>
>>> Visiting Researcher, Zuse Institute Berlin Professor, Lehigh<br>
>>> University<br>
>>> <a href="tel:%28610%29%20628-1280">(610) 628-1280</a><br>
>>> ted 'at' lehigh 'dot' edu<br>
>>> <a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
>>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__coral.ie.lehigh" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__coral.ie.lehigh</a><br>
>>> .edu_-7Eted&d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r<br>
>>> =9jaw7Wd-6mEsLj8M5sB-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw6v6<br>
>>> lST8C3JW6sUaNToiFlJFro&s=WkE3kfeZsAqiGAv4PqAvuTWrEz9tG3_xWgUBf0BineA<br>
>>> &e= ><br>
>> -------------- next part -------------- An HTML attachment was<br>
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>> rg_pipermail_dip_attachments_20170216_27022c60_attachment.html&d=DwIC<br>
>> Ag&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=9jaw7Wd-6mEsLj8M5s<br>
>> B-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw6v6lST8C3JW6sUaNToiFlJF<br>
>> ro&s=OJeQqwXo6WkAqjuID7YTzaYV8NYXx52JYBjIWY3vOl8&e= ><br>
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>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o</a><br>
>> rg_pipermail_dip_attachments_20170216_27022c60_attachment.zip&d=DwICA<br>
>> g&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=9jaw7Wd-6mEsLj8M5sB<br>
>> -_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw6v6lST8C3JW6sUaNToiFlJFr<br>
>> o&s=rBQ0HWDLxxP04iDpKPrh1c6y9y7WoKcpeQmIfFdNOlY&e= ><br>
>> -------------- next part -------------- An HTML attachment was<br>
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>> rg_pipermail_dip_attachments_20170216_27022c60_attachment-2D0001.html<br>
>> &d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=9jaw7Wd-6mE<br>
>> sLj8M5sB-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw6v6lST8C3JW6sUaN<br>
>> ToiFlJFro&s=mH0x47cteANLXlDmXDhxjDZu8kBG6_GH1SlKU7wGNuA&e= ><br>
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>> URL:<br>
>> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o" target="_blank">https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.o</a><br>
>> rg_pipermail_dip_attachments_20170216_27022c60_attachment.bin&d=DwICA<br>
>> g&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=9jaw7Wd-6mEsLj8M5sB<br>
>> -_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw6v6lST8C3JW6sUaNToiFlJFr<br>
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>> scrubbed...<br>
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>> rg_pipermail_dip_attachments_20170216_27022c60_attachment-2D0002.html<br>
>> &d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=9jaw7Wd-6mE<br>
>> sLj8M5sB-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-CeFlEkw6v6lST8C3JW6sUaN<o:p></o:p></p>
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<p class="MsoNormal">>> ToiFlJFro&s=C1pewFX7_5jwlu2jTj7qOnexKVOn1vPSN8tCHk4fi1Y&e= ><br>
>><br>
>> ------------------------------<br>
>><br>
>> Subject: Digest Footer<br>
>><br>
>> _______________________________________________<br>
>> Dip mailing list<br>
>> <a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a><br>
>> <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.or" target="_blank">
https://urldefense.proofpoint.com/v2/url?u=http-3A__list.coin-2Dor.or</a><br>
>> g_mailman_listinfo_dip&d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxW<br>
>> PA_2Wlc4&r=9jaw7Wd-6mEsLj8M5sB-_WXWhyouqYESO4E_zKqChXU&m=yUGU_75-7m-C<br>
>> eFlEkw6v6lST8C3JW6sUaNToiFlJFro&s=acd50ax2AqfCsE4GVYm-8JSKY4FtgK5BEvx<br>
>> L3B9vo7I&e=<br>
>><br>
>> ------------------------------<br>
>><br>
>> End of Dip Digest, Vol 44, Issue 3<br>
>> **********************************<br>
><br>
> _______________________________________________<br>
> Dip mailing list<br>
> <a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a><br>
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<br>
<br>
_______________________________________________<br>
Dip mailing list<br>
<a href="mailto:Dip@list.coin-or.org">Dip@list.coin-or.org</a><br>
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</div>
</div>
</blockquote>
</div>
<p class="MsoNormal"><br>
<br clear="all">
<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">-- <o:p></o:p></p>
<div>
<div>
<div>
<div>
<p class="MsoNormal">Dr. Ted Ralphs<br>
Visiting Researcher, Zuse Institute Berlin<br>
Professor, Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu<br>
<a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><o:p></o:p></p>
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