<div dir="ltr">Yes. Understood.<div><br></div><div>It is probably a bug in the GAP example code. I have not looked at it in over 10 years.</div><div><br></div><div>As for branch-and-price (BP) vs branch-and-cut (BC) for GAP, in my experience GAP is handled quite well by BC -- and BP will rarely outperform it (in most cases) - at least using a "standard" (generic) BP implementation. I am sure it is possible to make BP competitive with BC for GAP with some tricks. But, I have not seen good evidence of this for a standard approach. </div><div><br></div><div>I think BC solvers have just gotten really good at generating strong cuts for those polytopes (in GAP). So, BP will add no real value there. </div><div><br></div><div>BP "wins" on two main cases (in my experience): (a) block angular where parallelism is exploited, (b) cases where the known cutting planes in BC solvers are ineffective - so BP gets the bound strength from a different direction (the inner expansion of the polytope, rather than an outer expansion).</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 12, 2019 at 5:20 PM Florian Fontan <<a href="mailto:dev@florian-fontan.fr">dev@florian-fontan.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Thanks! Yes, it is very likely that I just misunderstand what the
code is doing<br>
</p>
<p>I linked this article since it is the best branch-and-price
published. But the previous state-of-the-art exact algorithm was
already a branch-and-price
<a class="gmail-m_4471015842363504275moz-txt-link-freetext" href="https://pubsonline.informs.org/doi/abs/10.1287/opre.45.6.831" target="_blank">https://pubsonline.informs.org/doi/abs/10.1287/opre.45.6.831</a> and
the current one strongly relies on the Lagrangian relaxation
<a class="gmail-m_4471015842363504275moz-txt-link-freetext" href="https://link.springer.com/article/10.1007/s10589-011-9432-0" target="_blank">https://link.springer.com/article/10.1007/s10589-011-9432-0</a></p>
<p>Florian<br>
</p>
<div class="gmail-m_4471015842363504275moz-cite-prefix">Le 12/06/2019 à 23:07, Matthew Galati a
écrit :<br>
</div>
<blockquote type="cite">
<div dir="ltr">Yes, the bound at the root should be at least as
good as the LP bound and yes, it is equal to the Lagrangian
bound. If Ted has some time, maybe he can investigate. It sounds
like the code might not be doing what you think it is doing.
<div><br>
</div>
<div>As for "decomposition" working "well" on GAP... don't
believe everything you read on OptOnline. :) </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Jun 12, 2019 at 4:49
PM Florian Fontan <<a href="mailto:dev@florian-fontan.fr" target="_blank">dev@florian-fontan.fr</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>I tested the default version, i.e. the one using
Pisinger's algorithm to solve the knapsack sub-problems.<br>
</p>
<p>Decomposition techniques should work rather well for GAP.
For example: <a class="gmail-m_4471015842363504275gmail-m_-6367385124288024322moz-txt-link-freetext" href="http://www.optimization-online.org/DB_FILE/2004/11/990.pdf" target="_blank">http://www.optimization-online.org/DB_FILE/2004/11/990.pdf</a><br>
</p>
<p>Furthermore, isn't the PC relaxation supposed to be at
least as good as the linear relaxation? I though it was
even supposed to be equal to the bound from the Lagrangian
relaxation of the assignment constraints. I've implemented
on my own the Lagrangian relaxation of the assignment
constraints that I solved with Vol from COIN-OR, and it
finds a lower bound of 1698 in 0.02s for instance a05100.
And I'm sure that the problems are exactly the same.</p>
<p>For the 1693 with doCut=1, it really seems to me that it
may come from the non-implementation of the knapsack
constraints in GAP_DecompApp.cpp</p>
<p> setModelRelax(NULL, modelName, i);</p>
<p>I don't know if there's a reason why they are not added
here whereas they are in GAP_DecompApp3.cpp</p>
<p>Florian<br>
</p>
<div class="gmail-m_4471015842363504275gmail-m_-6367385124288024322moz-cite-prefix">Le
12/06/2019 à 22:23, Matthew Galati a écrit :<br>
</div>
<blockquote type="cite">
<div dir="ltr">Sure that can happen. It just means that
the PC relaxation is too weak and that is a bad way to
solve the problem. Is that with the KP oracle or the AP
oracle? I would expect the bound using the KP oracle to
be strong.
<div><br>
</div>
<div>If you get 1693 with doDirect or doCut but 1698
with CBC, then either (a) there is a bug, or (b) you
are not creating the same model.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Jun 12, 2019
at 4:14 PM Florian Fontan <<a href="mailto:dev@florian-fontan.fr" target="_blank">dev@florian-fontan.fr</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Indeed! I didn't think to look there.</p>
<p>I managed to compile the GAP example. I tested on
instance a05100. This instance is solved optimally
by a naive implementation in CBC in 0.005s. The
optimal value is 1698 which is actually also the
upper bound from the linear relaxation. When I try
the GAP implementation given as example in Dip on
this instance (./decomp_gap --param gap.parm)</p>
<ul>
<li>with doPriceCut = 1, doCut = 0, doDirect = 0:
the lower bound found is 1556, no feasible
solution is found and the algorithm doesn't
terminate after at least several minutes</li>
<li>with doPriceCut = 0, doCut = 1, doDirect = 0
or doDirect = 1: the algorithm terminates very
quickly, returning a best lower bound and a best
upper bound of 1693. I think it may be the
solution of the problem with the capacity
constraints removed.</li>
</ul>
<p>Is this the expected behavior?</p>
<p>Florian<br>
</p>
<div class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119moz-cite-prefix">Le
11/06/2019 à 22:34, Matthew Galati a écrit :<br>
</div>
<blockquote type="cite">
<div dir="ltr">The Makefile gives some hints...
one case using the built-in MILP solver, one
case uses a KP solver.
<div><br>
</div>
<div>
<table class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-highlight gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-tab-size gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line-container">
<tbody style="box-sizing:border-box">
<tr style="box-sizing:border-box">
<td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC25" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap">
<table class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-highlight gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-tab-size gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line-container" style="box-sizing:border-box;border-collapse:collapse;border-spacing:0px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:14px;white-space:normal"><tbody style="box-sizing:border-box"><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L25" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC25" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span>PC: oracle for KP solve is Pisinger, BranchEnforceInMaster</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L26" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC26" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-smi" style="box-sizing:border-box">OBJS</span> += GAP_DecompApp.@OBJEXT@</td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L27" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC27" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-smi" style="box-sizing:border-box">CFLAGS</span> = -DVERSION1</td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L28" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC28" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap">
</td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L29" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC29" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span>TODO: BranchEnforceInSubProb using GAP_DecompApp2 or by option</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L30" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC30" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap">
</td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L31" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC31" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span> CPM/PC: built-in MILP solver, dense model build</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L32" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC32" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span> BranchEnforceInMaster or BranchEnforceInSubProb by option</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L33" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC33" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span>OBJS += GAP_DecompApp3.@OBJEXT@</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L34" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC34" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span>CFLAGS += -DVERSION3</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L35" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC35" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap">
</td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L36" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC36" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span> CPM/PC: built-in MILP solver, sparse model build</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L37" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC37" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span> BranchEnforceInMaster or BranchEnforceInSubProb by option</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L38" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC38" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span>OBJS += GAP_DecompApp4.@OBJEXT@</span></td></tr><tr style="box-sizing:border-box"><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-L39" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-num gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-line-number" style="box-sizing:border-box;padding:0px 10px;color:rgba(27,31,35,0.3);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;line-height:20px;min-width:50px;text-align:right;vertical-align:top;white-space:nowrap;width:50px">
</td><td id="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-LC39" class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-blob-code-inner gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-js-file-line" style="box-sizing:border-box;padding:0px 10px;line-height:20px;vertical-align:top;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:12px;overflow:visible;white-space:pre-wrap"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box;color:rgb(106,115,125)"><span class="gmail-m_4471015842363504275gmail-m_-6367385124288024322gmail-m_-6113883389000557119gmail-pl-c" style="box-sizing:border-box">#</span>CFLAGS += -DVERSION4</span></td></tr></tbody></table>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Jun
11, 2019 at 3:41 PM Florian Fontan <<a href="mailto:dev@florian-fontan.fr" target="_blank">dev@florian-fontan.fr</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear Dip
community,<br>
<br>
I am trying to get familiar with Dip and
understand how it works. Could <br>
someone tell me the differences between the
multiple DecompApp <br>
implementation examples for the Generalized
Assignment Problem?<br>
<a href="https://github.com/coin-or/Dip/tree/master/Dip/examples/GAP" rel="noreferrer" target="_blank">https://github.com/coin-or/Dip/tree/master/Dip/examples/GAP</a><br>
<br>
For example, in GAP_DecompApp.cpp, I noticed
that the setModelRelax call <br>
passes NULL as first argument:<br>
<br>
setModelRelax(NULL, modelName, i);<br>
<br>
whereas in GAP_DecompApp3.cpp, an other model
is defined:<br>
<br>
status = createModelPartKP(modelRelax,
i);<br>
modelName = "KP" + UtilIntToStr(i);<br>
setModelRelax(modelRelax, modelName, i);<br>
<br>
What does that mean? I haven't found any
documentation about it<br>
<br>
Florian<br>
_______________________________________________<br>
Dip mailing list<br>
<a href="mailto:Dip@list.coin-or.org" target="_blank">Dip@list.coin-or.org</a><br>
<a href="https://list.coin-or.org/mailman/listinfo/dip" rel="noreferrer" target="_blank">https://list.coin-or.org/mailman/listinfo/dip</a><br>
</blockquote>
</div>
</blockquote>
</div>
</blockquote>
</div>
</blockquote>
</div>
</blockquote>
</div>
</blockquote>
</div>
</blockquote></div>