gu – Typeset crystallographic group-subgroup-schemes

The pack­age sim­pli­fies type­set­ting of sim­ple crys­tal­lo­graphic group-sub­group-schemes in the Bärnighausen for­mal­ism. It de­fines a new en­vi­ron­ment stamm­baum, wherein all el­e­ments of the scheme are de­fined. After­wards all nec­es­sary di­men­sions are cal­cu­lated and the scheme is drawn. Cur­rently two steps of sym­me­try re­duc­tion are sup­ported.