  <td><code><a name="equivalent1">equivalent&lt;T&gt;</a></code><br>
         <code>equivalent1&lt;T&gt;</code></td>

        <td><code>bool operator==(const T&amp;, const T&amp;)</code></td>

        <td><code>t &lt; t1</code>.<br>
         Return convertible to <code>bool</code>. See the <a href=
        "#ordering">Ordering Note</a>.</td>
      </tr>

      <tr>
        <td><code><a name="equivalent2">equivalent&lt;T, U&gt;</a></code><br>
         <code>equivalent2&lt;T, U&gt;</code></td>

        <td><c