/div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>                   <span class="keyword">auto</span>                result = a * block * vec_x;</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span> </div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>                   <span class="keyword">auto</span> seg_y = y.segment&lt;N&gt;(i * N);</div>
<div class="line"><a id="l00051" name="l00051"></a