an
<code>i</code> .</td>
</tr>
<tr>
<td><code>iterator lower_bound (index_type i)</code></td>
<td>Finds the first element whose index is not less than
<code>i</code> .</td>
</tr>
<tr>
<td><code>const_iterator upper_bound (index_type i)
const</code></td>
<td>Finds the first element whose index is greater than
<code>i</code> .</td>
</tr>
<tr>
<td><code>iterator upper_bound (index_type i)</code></td>
<td>Finds the first element whose index is greater than
<code>i</code> .</td>
</tr>
<tr>
<td><code>const_iterat