CTAN has a new package: gu

[CTAN Announcements]

A new package has been installed at tug.ctan.org and should soon be at
your favorite mirror.

Thanks again,
Jim Hefferon
Saint Michael's College

......................................................................

The following information was provided by our fellow contributor:

Name of contribution: gu
Author's name: Stefan Lange
Location on CTAN: /macros/latex/contrib/gu
Summary description: Typeset crystallographic group-subgroup-schemes 
  in Bärnighausen formalism
License type: lppl

Announcement text: 
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The aim of the package gu.sty is to simplify 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.

Das Paket gu.sty erleichtert das Setzen von einfachen kristallographischen
Gruppe-Untergruppe-Schemata im Bärnighausen-Formalismus und/oder
Lagenfortführungstabellen. Die einzelnen Elemente und Abstände werden
innerhalb einer neuen Umgebung namens "stammbaum" mittels vorgegebener
Kommandos definiert. Anschließend werden alle Abstände automatisch berechnet
und der Stammbaum und/oder die Tabellen ausgegeben. Momentan werden maximal
zwei Abstiegsschritte unterstützt.
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This package is located at 
   http://tug.ctan.org/tex-archive/macros/latex/contrib/gu
.  More information is at
   http://tug.ctan.org/cgi-bin/ctanPackageInformation.py?id=gu
(if the package is new it may take a day for that information to 
appear).  We are supported by the TeX Users Group http://www.tug.org .  
Please join a users group; see http://www.tug.org/usergroups.html .