# symmetry keywords

Symmetry parameters

## symmetry.spacesymmetry

Determines whether to use the space group of the lattice to reduce the
Brillouin zone. This option is false by default because translating
wavefunctions requires interpolation which introduces error if the
resolution is not high enough. Space group symmetries can be used to
reduce the Brillouin zone in DOS calculations but not PDOS calculations
since RESCU cannot symmetrize the LCAO coefficients.

**type**: `scalar`

**default**: `false`

**allowed**: `true,false`

**example**: `symmetry.spacesymmetry = true`

## symmetry.pointsymmetry

Determines whether to use the point group of the lattice to reduce the
Brillouin zone. Space group symmetries can be used to reduce the
Brillouin zone in DOS calculations but not PDOS calculations since RESCU
cannot symmetrize the LCAO coefficients.

**type**: `scalar`

**default**: `true`

**allowed**: `true,false`

**example**: `symmetry.pointsymmetry = true`

## symmetry.timereversal

Determines whether to use the time-reversal symmetry. This option is
fully supported in time-reversal symmetric problems.

**type**: `scalar`

**default**: `true`

**allowed**: `true,false`

**example**: `symmetry.timereversal = false`
