n class="p">(</span><span class="n">Y_PHI</span><span class="p">(</span><span class="n">cc</span><span class="p">))</span>


     
     <span class="n">B_X</span><span class="p">(</span><span class="n">cc</span><span class="p">)</span> <span class="o">=</span> <span class="n">B_R</span><span class="p">(</span><span class="n">cc</span><span class="p">)</span><span class="o">*</span><span class="n">cP</span><span class="p">(</span><span class="n">cc</span><span class="p">)</span> <span class="o">-</span> <spa