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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>To help illustrate -- I will create several variants of the GAP
example (sparse build, dense build, built-in MILP oracle, user-defined oracle,
etc) to show the different use cases. I'll let you know when that is done.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Matt<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
kippmartin71@yahoo.com [mailto:kippmartin71@yahoo.com] <br>
<b>Sent:</b> Saturday, September 04, 2010 2:21 AM<br>
<b>To:</b> Matthew Galati<br>
<b>Cc:</b> dip@list.coin-or.org<br>
<b>Subject:</b> SmallIP Example and Implicity Polyhedra<o:p></o:p></span></p>
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<p class=MsoNormal>Hi:<br>
<br>
In the Dip/examples/SmallIP<br>
<br>
the use of <br>
<br>
setModelRelax(NULL);<br>
<br>
is illustrated, presumably for implicitly defined polyhedra. But in this
example there is only one block. When using<br>
<br>
setModelRelax(NULL);<br>
<br>
Hi:<br>
<br>
In the Dip/examples/SmallIP<br>
<br>
the use of <br>
<br>
setModelRelax(NULL);<br>
<br>
is illustrated, presumably for implicitly defined polyhedra. But in this
example there is only one block. When using<br>
<br>
setModelRelax(NULL);<br>
<br>
how do you specify the block? <br>
<br>
I need to solve a problem that is block angular (more than one block) and not
give an explicit description of the block polyhedra. I am still really confused
on how to do this. Is the following sufficient?<br>
<br>
1) For each block create a DecompConstraintSet, i.e.<br>
<br>
modelRelax = new DecompConstraintSet();<br>
<br>
<br>
2) For modelRelax in each block specify the columns that define the block using<br>
<br>
modelRelax->activeColumns.push_back( i)<br>
<br>
3) For each block call the method<br>
<br>
modelRelax->fixNonActiveColumns();<br>
<br>
4) For each block call<br>
<br>
<br>
setModelRelax(NULL);<br>
<br>
But how can this work since the setModelRelax does not know the block name or
number? I have studied the examples, but it seems like in every example
the constraint matrix is specified for the blocks and I don't see an example of
setModelRelax() with more than one block. I just cannot figure out what
the sufficient steps are for this case.<br>
<br>
Thanks<o:p></o:p></p>
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