identifier">calculate_constants</span><span class="special">.</span><span class="identifier">hpp</span></code> if the
      constant is to be added to this library, or else defined at the top of your
      source file if not.
    </p>
<p>
      The function should look like this:
    </p>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">math</span><span class=