P mode, you must begin your CVX specification with the
command <tt class="docutils literal"><span class="pre">cvx_begin</span> <span class="pre">gp</span></tt> or <tt class="docutils literal"><span class="pre">cvx_begin</span> <span class="pre">GP</span></tt> instead of simply
<tt class="docutils literal"><span class="pre">cvx_begin</span></tt>. For example, the following code, found in the example
library at <tt class="file docutils literal"><span class="pre">gp/max_volume_box.m</span></tt>, determines the