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Dear GAP-users,

We would like to announce the availability of two new GAP pack-

ages.

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

pub/incoming/grpid.tar.gz

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

the package.

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@math.rwth-aachen.de

Bettina.Eick@math.rwth-aachen.de

Best wishes,

Hans Ulrich Besche and Bettina Eick

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