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<div class="moz-cite-prefix">Fei,<br>
<br>
gubVersion returns a shrunken model with the matrix type
ClpDynamicMatrix which has the extra rows and columns and the idea
is that primal will then use that in a gub style algorithm. You
may find it easier to look at the gub examples in Clp/examples.<br>
<br>
I would not be surprised if something has got broken - but that
can be fixed. <br>
<br>
Give Richard Van Slyke credit as well as George Dantzig - I think
GUB was being developed at Berkeley when I was doing a Masters
there!<br>
<br>
John Forrest<br>
<br>
<br>
On 07/05/14 16:23, Fei Peng wrote:<br>
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Hello clp community,
<div><br>
</div>
<div>I have a question about the routine resolveGub and gubVersion
included in osiClpSolverInterface and clpSimplexOther,
respectively. I was thinking that this implements the GUB
simplex by Dantzig, but it seems like gubVersion only shrinks
the model, gives the model back to the solverinterface and let
it do primal()? maybe I’m not reading it careful enough but
could someone advise if this is what it’s supposed to do?</div>
<div><br>
</div>
<div>Thanks!</div>
<div>Fei</div>
<br>
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