emdoc">
<p>Solve the least squares problem </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">aTa</td><td>is the cross product matrix \( A^TA \) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">aTb</td><td>is the vector \( A^Tb \) </td></tr>
    <tr><td class="paramdir">[in,out]</td><td class="paramname">x</td><td>is the by-reference output and it is also the init solution (if <b>warmStart</b> == <code>tru