8"></a>00148             <span class="keyword">end do</span>
<a name="l00149"></a>00149          <span class="keyword">end do</span>
<a name="l00150"></a>00150 
<a name="l00151"></a>00151          <span class="comment">! Having constructed the d^(l+1/2) matrix in dd, do the second</span>
<a name="l00152"></a>00152          <span class="comment">! half-step recursion from dd to dl. Start by initilalising  </span>
<a name="l00153"></a>00153          <span class="comment">! the plane of the dl-matrix to 0.0.</