   <thead>
            <tr> <th width="30%">Command option</th> <th>Meaning</th></tr>
          </thead>
          <tbody>
            <tr>
              <td id="jaco"><code><strong>-j</strong></code> <em>{yes|no}</em></td> 
              <td align="left">Either to enforce or not positive jacobian in element groups with maximal topological dimension. The default value is 'yes'. Since positivity is checked using the third component of the normal vector, its enforcement is not recommend for two-dimensional me