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Program TSubgroups

Usage

1) TSubgroups 'file1' [-h] [-a] [-f] [-t]
2) TSubgroups -g [-c] 'file1' 'file2' 'file3' ['file4']
file1: Spacegroup R in standard affine form (without translations)
file2: Pointgroup P of R (with correct normalizer)
file3: GAP information about the conjugation classes of maximal subgroups of the point group P of R.
file4: (optional) Presentation of P

Description

Calculate the maximal translationengleich subgroups of a given space group up to conjugation in this space group!

Options

-h : Give a short help.
-a : Calculate subgroups up to conjugation under
     the affine normalizer of R.
-f : Write representatives in files 'file1'_i.
-t : Omit the last dim R generators.
-g : Do not use the database, use your own GAP-words.
     (Only for experts!)
-c : Output for constructing the database. Do not use!

Remarks

See also for TSupergroups and Standard_affine_form.

Examples

  1. Calculate minimal/maximal klassengleich/translationengleich super-/sub-groups of a given space group up to conjugation under the affine normalizer of this group.

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