pan class="w">      </span><span class="n">iupper</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">5000</span>
<span class="w">      </span><span class="n">an</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">N</span>
<span class="w">      </span><span class="n">fmin</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">2.0_wp</span><span class="o">/</span><span class="p">(</spa