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    <h2><span class="anchor" id="src"></span>Source Code</h2>
    <div class="highlight"><pre><span></span><span class="k">FUNCTION </span><span class="n">PSI_ROT_exp</span><span class="p">(</span><span class="n">R</span><span class="p">,</span><span class="n">R0</span><span class="p">,</span><span class="n">sigR</span><span class="p">,</span><span class="n">Z</span><span class="p">,</span><span class="n">Z0</span><span class="p">,</span><span class="n">sigZ</span><span class="p">,</span><span class="n