n class="lineno">   53</span>                         <span class="keyword">const</span> Eigen::Vector&lt;T, dim&gt;&amp; e0,</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>                         <span class="keyword">const</span> Eigen::Vector&lt;T, dim&gt;&amp; e1);</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span> </div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="key