that is non-convex into one that is convex (for
example, <a class="reference internal" href="gp.html#gp-mode"><em>geometric programs</em></a>). This has not been the case for any
problem submitted by our users&#8212;so far.</p>
</li>
<li><p class="first">The model <em>is</em> convex, but it is still written in a manner that violates the rules.
For instance, given the same vector <tt class="docutils literal"><span class="pre">x</span></tt> above, the constraint</p>
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