inimize( square_pos( norm( A * x - b ) ) )
</pre></div>
</div>
<p>But equivalence is also preserved if we eliminate the square altogether:</p>
<div class="highlight-none"><div class="highlight"><pre>minimize( norm( A * x - b ) )
</pre></div>
</div>
<p>The optimal value of <tt class="docutils literal"><span class="pre">x</span></tt> is identical in all three cases, but this last version is
likely to produce more accurate results. Of course, if you <em>need</em> the value of the
squared norm, you can always r