n the namespace boost::sort
        </p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">sort</span><span class="special">/</span><span class="identifier">sort</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<p>
          The parallel algorithms have 4 invocation formats:
        </p>
<pre class="pr