class="special">,</span> <span class="number">0.25</span><span class="special">);</span>
</pre>
<p>
          But this is inconveniently long, so we might be tempted to write
        </p>
<pre class="programlisting"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">;</span>
</pre>
<p>
          but this might risk ambiguity with names in <code class="computero