The point group symmetry of the system is determined automatically
and can be checked (option Sy in various menus). Normally,
translations are also taken into account when checking equivalence
of atoms, i.e. two point in space are thought to be equivalent if
they are separated by a lattice translation
with
being integers. There are some exceptions though corresponding
to molecular properties, specifically options Cl (Section
2.6.4) and Vm (Section 2.6.8.5)
of the main menu, when translations are ignored. The symmetry is used
in many parts of the code.
At the moment, all symmetry operations are fixed to the axes of the Cartesian coordinate system. The complete list of the symmetry operations is shown in Figs. 2.1 and 2.2.