 headline">¶</a></h2>
<p>One particular reformulation that we <em>strongly</em> encourage is to eliminate quadratic
forms&#8212;that is, functions like <tt class="docutils literal"><span class="pre">sum_square</span></tt>, <tt class="docutils literal"><span class="pre">sum(square(.))</span></tt> or <tt class="docutils literal"><span class="pre">quad_form</span></tt>&#8212;whenever
it is possible to construct equivalent models using <tt class="docutils literal"><span class="pre">norm</span></tt> instead.
Ou