<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Are you talking about QPs or QCPQs? CPLEX can handle non convex QPs and they do not even have <div class="">to be binary. If they are binary they can be linearized or convexified and other solvers can handle them</div><div class="">as well. See my QPLIB benchmarks on <a href="http://plato.asu.edu/bench.html" class="">http://plato.asu.edu/bench.html</a></div><div class="">However, if you have quadratic constraints you need a global solver.</div><div class=""><br class=""></div><div class="">Hans Mittelmann</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Aug 9, 2017, at 3:33 AM, Vyacheslav Kungurtsev <<a href="mailto:vyacheslav.kungurtsev@fel.cvut.cz" class="">vyacheslav.kungurtsev@fel.cvut.cz</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class=""><div class="">Hello,<br class=""><br class="">I am trying to find a solver (available via academic license at most)
for nonconvex binary QPs. CPLEX requires the constraint quadratics to be
positive semi-definite, so I stumbled on to SCIP after finding the OPTI
toolbox. But the OPTI toolbox is apparently only available for Windows,
so I figured directly installing scip to run in matlab should be
possible, but unlike opti there is no matlab interface, apparently. <br class=""><br class="">I haven't
heard of any of the formats specified in the SCIP documentation, are
there any you would recommend as being straightforward to write a script
to convert into the proper data format by printing appropriately from
MATLAB problem data? I have heard it is possible to access it through ampl, but how would you run scip through the ampl mex?<br class=""><br class=""></div>Thank you<br class=""></div></div>
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