"s1">&#39;N&#39;</span><span class="p">))</span><span class="w"> </span><span class="k">then</span><span class="w"></span>
<span class="c">!</span>
<span class="c">!        Form  x:= A*x.</span>
<span class="c">!</span>
<span class="w">          </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">lsame</span><span class="p">(</span><span class="n">uplo</span><span class="p">,</span><span class="s1">&#39;U&#39;</span><span class="p">))</span><span class="w"> </span