<br><font size=2 face="sans-serif">For Stefano Gliozzi I will have to code
SOS2 but semi-continuous variables already exist as lotsizing variables.</font>
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<br><font size=2 face="sans-serif">A lotsizing variable has a set of valid
ranges e.g.</font>
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<br><font size=2 face="sans-serif">0 -> 0</font>
<br><font size=2 face="sans-serif">1 -> 3</font>
<br><font size=2 face="sans-serif">10 -> 10</font>
<br><font size=2 face="sans-serif">15 -> 33</font>
<br><font size=2 face="sans-serif">100 -> 1000000</font>
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<br><font size=2 face="sans-serif">An example to show this is in Samples/sample3.cpp</font>
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<br><font size=2 face="sans-serif">John Forrest</font>
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