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<p>Ashutosh,<br>
<br>
It is a feature rather than a full blown bug.<br>
<br>
The Gomory cut is generated from the tableau and it is the length of that cut which is tested. So the first cut generated for acc3 has 499 elements and that is less than 600. However the cut has to be converted back to just have column elements rather than slacks. Normally this does not make very much difference. However with this problem - 3249 rows, 1620 columns and continuous and integer objectives of 0.0, the converted cut has 1554 elements.<br>
<br>
I can modify the code to have another limit - which would not impact current users or I could make the limit on final number, which would change actions for current users. What would people prefer?<br>
<br>
John Forrest<br>
<br>
<img width="16" height="16" src="cid:1__=0ABBFE5ADFB709DF8f9e8a93df938@us.ibm.com" border="0" alt="Inactive hide details for Ashutosh Mahajan ---09/18/2008 01:19:00 AM---hi all,"><font color="#424282">Ashutosh Mahajan ---09/18/2008 01:19:00 AM---hi all,</font><br>
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<font size="2" color="#5F5F5F">From:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFE5ADFB709DF8f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">Ashutosh Mahajan <asm4@lehigh.edu></font></td></tr>
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<font size="2">cgl@list.coin-or.org</font></td></tr>
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<font size="2" color="#5F5F5F">Date:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFE5ADFB709DF8f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">09/18/2008 01:19 AM</font></td></tr>
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<font size="2" color="#5F5F5F">Subject:</font></td><td width="100%"><img width="1" height="1" src="cid:2__=0ABBFE5ADFB709DF8f9e8a93df938@us.ibm.com" border="0" alt=""><br>
<font size="2">[Cgl] length of gomory cuts</font></td></tr>
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<tt>hi all,<br>
i am having problems in setting the maximum length of gomory cuts generated by<br>
CglGomory. i do:<br>
<br>
CglGomory *gomory = new CglGomory;<br>
gomory->setLimit(600);<br>
gomory->generateCuts(*si, cutlist);<br>
<br>
full code is available at </tt><tt><a href="http://coral.ie.lehigh.edu/~asm4/src/tmp/">http://coral.ie.lehigh.edu/~asm4/src/tmp/</a></tt><tt><br>
<br>
however, the cuts generated have length more than 1500 for<br>
instances acc3, acc4, acc5 (</tt><tt><a href="http://www.ps.uni-sb.de/~walser/acc/acc.html">http://www.ps.uni-sb.de/~walser/acc/acc.html</a></tt><tt>). i<br>
see this problem in both /trunk and /stable/0.53/. <br>
<br>
is the above the right way to set limit? or is there a bug?<br>
--<br>
regards<br>
Ashutosh Mahajan<br>
</tt><tt><a href="http://coral.ie.lehigh.edu/~asm4">http://coral.ie.lehigh.edu/~asm4</a></tt><tt><br>
<br>
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