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<p>Hi</p>
<p>I am just curious to know how ''deterministic'' CBC is. I know
this question has been raised a few times in this forum i.e.</p>
<p><a class="moz-txt-link-freetext" href="http://list.coin-or.org/pipermail/cbc/2016-February/001891.html">http://list.coin-or.org/pipermail/cbc/2016-February/001891.html</a></p>
<p><a class="moz-txt-link-freetext" href="http://list.coin-or.org/pipermail/cbc/2015-January/001580.html">http://list.coin-or.org/pipermail/cbc/2015-January/001580.html</a></p>
<p>I have embedded CBC in my own application. In the case where I
impose an integrality gap (e.g. 20%), I have had my program
stopping and returning with different final optimality gaps (e.g.
12% and 19%). It is actually a little difficult to reproduce. I am
wondering whether this could come from the fact that I have (re)
implemented the optimality gap stopping condition (with others
actually) in the callback</p>
<p>CbcEventHandler::CbcAction myCbcEventHandler::event(CbcEvent
whichEvent)<br>
{</p>
<p>...<br>
if (dIntGapCalc < dIntGapRef) {</p>
<p> ...</p>
<p> return stop;<br>
}</p>
<p> ...</p>
<p> }</p>
<p>....<br>
</p>
<p>}</p>
<p>Thanks in advance</p>
<p><br>
</p>
<div class="moz-signature">-- <br>
Alexis Guigue, E.I.T., B.Eng., M.A.Sc., Ph.D. <br>
Software Engineer/Research Engineer <br>
604-519-6222, ext. 107 <br>
<br>
<a href="http://www.softree.com">Softree Technical Systems Inc.</a>
<br>
Engineering an Easier Way <br>
<br>
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