
Proponga su transformación (paso $[$step+1]):

  !form reply
  <input type=hidden name=modif value=exchange>
  <input type=submit value="Intercambiar"> $name_lines
  !formselect origin from 1 to $size
  y
  !formselect dest from 1 to $size
  .</form>

  !form reply
  <input type=hidden name=modif value=add>
  <input type=submit value="Añadir">
  <input size=10 name=coef> veces la $name_line
  !formselect origin from 1 to $size
  a la $name_line
  !formselect dest from 1 to $size
  .
  !if $field=Z
   <br><small>(El múltiplo debe ser un entero.)
   </small>
  !endif
  !if $field=G
   <br><small>(El múltiplo debe ser un entero de Gauss.)
   </small>
  !endif
  </form>
  
  !form reply
  <input type=hidden name=modif value=multiply>
  <input type=submit value="Multiplicar"> $name_line
  !formselect dest from 1 to $size
  por
  !if $field=Z
   <input type=hidden name=coef value=-1> -1.
  !else
   !if $field=G
    !formselect coef list -1,i,-i
   !else
    <input size=10 name=coef>.
   !endif
  !endif
  </form>
  !if $step>0
   <table border=0 cellspacing=10 cellpadding=4 bgcolor=#d0d0d0><tr>
   <td>
   !href cmd=reply&modif=undo Deshacer
   <td>
   !href cmd=reply&modif=restart Reiniciar
   </table>
  !endif

