tyle: italic; font-weight: bold;">L</span>) : <big><span
 style="font-family: script mt bold;">P</span></big><span
 style="font-family: arial;">expression</span>(<span
 style="font-style: italic; font-weight: bold;">L</span>) &#8594; <span
 style="font-family: arial;">closed-theory</span>(<span
 style="font-style: italic; font-weight: bold;">L</span>)<br>
      </td>
    </tr>
    <tr>
      <td style="vertical-align: top;"><span style="font-family: arial;">join</span>(<span
 style="font-style: italic; font