yword">end</span>
0356         bSafeguard = 0;
0357       <span class="keyword">else</span>
0358         <span class="comment">% test interiority condition for parabolic minimizer alp0</span>
0359         fact = (alp1/alp2)^(1/3);
0360         <span class="keyword">if</span> (denom &gt; 0 &amp;&amp; (alp0 &gt;= fact*alp2 &amp;&amp; alp1 &gt;= fact*alp0))
0361           <span class="comment">% safeguarded parabolic minimization</span>
0362           alpd = alp0;
0363         <span class="keyword">else</span>