l">(</span><span class="identifier">x</span><span class="special">,</span><span class="identifier">y</span><span class="special">)</span>
                  <span class="special">==</span> <span class="special">!</span><span class="identifier">disjoint</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span><span class="identifier">y</span><span class="special">)</span></code>
                </p>
                </td>
</tr>
</tbody>
</table></div>
<p>
          
</