We would like to announce the availability of two new GAP pack-
The first one is a catalogue of all groups of order up to 1000
without the groups of order 512 and 768.
The groups are listed up to isomorphism. The soluble groups are
given as AgGroups, the non-soluble groups are given as
permutation groups. To use this package you need GAP 3.4.3 and
the following file from our ftp server:
ftp to ftp.math.rwth-aachen.de
and get the file pub/incoming/grpcat.tar.gz.
There is a README file contained which gives all necessary infor-
mation about installation and usage of the package.
The second package contains a function which returns the cat-
alogue number of a given group in the above catalogue. The group
in question has to be given as AgGroup or PermGroup and has to
have order at most 1000 but not 256, 512 or 768. The catalogue
number is determined by computing invariants of the given group
and comparing with a stored list of invariants of the groups in
the catalogue. Thus this package is completely independent from
the catalogue itsself, but clearly it does not make much sence
without it :-). To use this package you need GAP 3.4.3 as well
and the file
from the above ftp server. Furthermore in this package the ANUPQ
share package of GAP is used in some cases.
Again there is a README file contained in the package which
gives all necessary information about installation and usage of
Suggestions and comments on both packages are welcome and should
be send directly to either of us. Our e-mail addresses are
Hans Ulrich Besche and Bettina Eick