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Thanks Matthias.
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<div>Is there a similar way to add operators on variables in the objective function.</div>
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<div>For example,
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<div id="divtagdefaultwrapper" dir="ltr" style="font-size: 12pt;"><span style="font-size: 12pt;"> model.<span>setObjective(</span>quicksum(exp(x[i]) for i in I), "minimize")</span></div>
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<div id="divtagdefaultwrapper" dir="ltr" style="font-size: 12pt;"><span style="font-size: 12pt;">Thanks a lot.</span></div>
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<div id="divtagdefaultwrapper" dir="ltr" style="font-size: 12pt;"><span style="font-size: 12pt;">Regards</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Matthias Miltenberger <miltenberger@zib.de><br>
<b>Sent:</b> Friday, April 7, 2017 4:40 PM<br>
<b>To:</b> sakib mondal; scip@zib.de<br>
<b>Subject:</b> Re: [SCIP] How to add operators on variables in a constraint</font>
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<div>Dear Sakib,<br>
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this constraint type is currently not yet supported by PySCIPOpt. You would need to write a new Conshdlr class that implements `exp()`. This might be a good starting point:
<a class="moz-txt-link-freetext" href="https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/tests/test_tsp.py" id="LPlnk161841" previewremoved="true">
https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/tests/test_tsp.py</a>
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<a id="LPImageAnchor_14918249846320.737368374205075" href="https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/tests/test_tsp.py" target="_blank" style="display: table-cell; text-align: center;"><img aria-label="Preview image with link selected. Double-tap to open the link." id="LPThumbnailImageID_14918249846330.6212091933272259" width="160" height="160" style="display: inline-block; max-width: 250px; max-height: 250px; height: 160px; width: 160px; border-width: 0px; vertical-align: bottom;" src="https://avatars3.githubusercontent.com/u/19473229?v=3&s=400"></a></div>
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<a id="LPUrlAnchor_14918249846340.058365477091355755" href="https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/tests/test_tsp.py" target="_blank" style="text-decoration: none;">SCIP-Interfaces/PySCIPOpt</a></div>
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github.com</div>
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PySCIPOpt - Python interface for the SCIP Optimization Suite</div>
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all the best<br>
Matthias<br>
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<div class="moz-cite-prefix">On 07.04.2017 17:15, sakib mondal wrote:<br>
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<p>Hi,</p>
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<p>I am trying to use scip solver where one of the constraints need exponentiation of a variable. For example,</p>
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<div><span style="font-size:12pt"> model.addCons(quicksum(exp(x[i]) for i in I) <span>==1, name="constraint")</span></span><br>
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<div>Wondering what would be possible ways to add this.</div>
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<div>I tried searching for such examples, but could not find any.</div>
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<div>Would appreciate any help. I am using pyscipopt.</div>
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<div>Regards</div>
<div>Sakib</div>
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Matthias Miltenberger
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