<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Dear Sakib,<br>
<br>
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">https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/tests/test_tsp.py</a><br>
<br>
all the best<br>
Matthias<br>
<br>
<div class="moz-cite-prefix">On 07.04.2017 17:15, sakib mondal
wrote:<br>
</div>
<blockquote
cite="mid:KL1PR0401MB1288267E43907E78C0FA0531BD0C0@KL1PR0401MB1288.apcprd04.prod.outlook.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
<div id="divtagdefaultwrapper"
style="font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif;"
dir="ltr">
<p>Hi,</p>
<div style="color: rgb(0, 0, 0);">
<div>
<div id="divtagdefaultwrapper" dir="ltr"
style="font-size:12pt; color:#000000;
font-family:Calibri,Arial,Helvetica,sans-serif">
<p><br>
</p>
<p>I am trying to use scip solver where one of the
constraints need exponentiation of a variable. For
example,</p>
<p><br>
</p>
<div><br>
</div>
<div><span style="font-size:12pt">
model.addCons(quicksum(exp(x[i]) for i in I) <span>==1,
name="constraint")</span></span><br>
</div>
<div><br>
</div>
<div>Wondering what would be possible ways to add this.</div>
<div><br>
</div>
<div>I tried searching for such examples, but could not
find any.</div>
<div><br>
</div>
<div>Would appreciate any help. I am using pyscipopt.</div>
<div><br>
</div>
<div>Regards</div>
<div>Sakib</div>
<div><br>
</div>
<br>
</div>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Scip mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Scip@zib.de">Scip@zib.de</a>
<a class="moz-txt-link-freetext" href="https://listserv.zib.de/mailman/listinfo/scip">https://listserv.zib.de/mailman/listinfo/scip</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
\__________________
Matthias Miltenberger
Zuse Institute Berlin
Takustr. 7, 14195 Berlin
<a class="moz-txt-link-abbreviated" href="http://www.zib.de/miltenberger">www.zib.de/miltenberger</a>
<a class="moz-txt-link-abbreviated" href="mailto:miltenberger@zib.de">miltenberger@zib.de</a>
+49 (30) 841 85-245</pre>
</body>
</html>