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.

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

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

$t$

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

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