   and so we are simply integrating x<sup>-p</sup>. Therefore we can use this approximation
        over (0, small), and integrate numerically from (small, &#960;/2), using &#949; as a suitable
        crossover point seems sensible:
      </p>
<pre class="programlisting"><span class="keyword">double</span> <span class="identifier">p</span> <span class="special">=</span> <span class="identifier">some_value</span><span class="special">;</span>
<span class="keyword">double</span> <span class="identifier">cros