))</span>
       <span class="n">Y_PHI</span><span class="p">(</span><span class="n">pp</span><span class="p">)</span> <span class="o">=</span> <span class="nb">MODULO</span><span class="p">(</span><span class="n">Y_PHI</span><span class="p">(</span><span class="n">pp</span><span class="p">),</span> <span class="mf">2.0_rp</span><span class="o">*</span><span class="n">C_PI</span><span class="p">)</span>
       <span class="n">Y_Z</span><span class="p">(</span><span class="n">pp</span><span class="p">)</span