The routine schlafli returns the ``modified'' version of schlafli symbol (or extended schlafli symbol) of the given polyhedron.

The command with(geom3d,schlafli) allows the use of the abbreviated form of this command.

$\mathrm{with}\left(\mathrm{geom3d}\right)\:$

$\mathrm{tetrahedron}\left(t\,\mathrm{point}\left(o\,1\,2\,3\right)\,3\right)$

$t$

$\mathrm{schlafli}\left(t\right)$

$\left[3\,3\right]$