">[</span><span class="number">1</span><span class="special">];</span>
<span class="special">}</span>
</pre>
<p>
        We need also to integrate the set of the perturbations. This is done in parallel
        to the original system, hence within one system function. Of course, we want
        to use the above definition of the Lorenz system, hence the definition of
        the system function including the Lorenz system itself and the perturbation
        could look like:
      </p>
<p>
</p>
<pre class="pr