<td style="text-align: left;  vertical-align: top; background: #fff3d9; padding: 2 2 2 5; "> .false.
         </td>
</tr>
<tr><td align="left" valign="top" colspan="2"><blockquote><pre style="margin-bottom: -1em;">
When set to .true. the Tamm-Dancoff approximation is used
in constructing the Liouvillian.
         </pre></blockquote></td></tr>
</table>
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