<div class="PageDoc"><div class="header">
  <table cellpadding="10"> <tr> <td> <div class="headertitle">    
      <div class="title">Vectors </div>
      </div></td>
      <td> &nbsp;&nbsp;&nbsp;&nbsp;</td>
      <td> <button class="TopMenuButton"><div><a href="#DenseVectors">Dense vectors</a></div></button></td>
      <td> <button class="TopMenuButton"><div><a href="#SparseVectors">Sparse vectors</a></div></button></td>
    </tr>
    </table>
</div><!--header-->
