## Program Presentation

### Usage

Presentation 'file' [-D]

file: bravais_TYP containing a finite matrix group G.
### Description

Calculates a presentation of the finite group G.
### Options

-D : meant for debugging. Do not use.

### Remarks

See also for Is_finite.
### Examples

- Do given matrices generate a space group? If so, find its name
and normal representation.
- Find all Z-classes, affine classes and torsion free space
groups in a given Q-class.