00272             <span class="keyword">end do</span>
<a name="l00273"></a>00273          <span class="keyword">end do</span>
<a name="l00274"></a>00274 
<a name="l00275"></a>00275          <span class="comment">! Having constructed the d^(l+1/2) matrix in dd, do the second</span>
<a name="l00276"></a>00276          <span class="comment">! half-step recursion from dd to dl. Start by initilalising  </span>
<a name="l00277"></a>00277          <span class="comment">! the plane of the dl-matrix to 0.0.</span>
<