#
The MeatAxe - Computing with Modular Representations.

This is the home page of the MeatAxe at
Lehrstuhl D für
Mathematik, RWTH Aachen,
Germany.

## Overview

The MeatAxe is a set of programs for working with matrix representations
over finite fields. Permutation representations are supported to some extent,
too.
## Major Features

If you consider using the MeatAxe for your research projects, the
following points may help to decide if the MeatAxe is suitable
for your needs:
- General
- The MeatAxe is free software and distributed in source code form.
- All programs are written in plain C.
- The MeatAxe is developed for the UNIX operating system. Supported
platforms include Linux (x86), SunOS/Solaris (Sparc), HP/UX,
DEC OSF/1 (Alpha), and Windows NT 4.0 (x86, Alpha, PPC).
- Compiling and installing the MeatAxe requires some familiarity
with your operating system.
- There is no graphical user interface. All programs are run by entering
command lines.

- Technical features
- Finite Fields up to GF(256) are supported.
- Matrices are stored efficiently. E.g., when working over GF(2) each
mark occupies only one bit.
- The programs have been optimized for speed. All algorithms are
implemented in C.
- Basic matrix operations: arithmetic, order, tensor product, Gauss
elimination.
- Condensation methods: Fixed point condensation of permutation
representations, condensation of tensor products.
- Module structure: Finding submodules by spin-up, calculation of
representations on submodules and factor modules, calculation of
composition factors (chopping), peak word condensation,
submodule lattices.

- For the software developer
- Most algorithms are packed in a single library which you can
use to build your own programs.
- Documentation of the MeatAxe library is included in LaTeX form.

For more information, the documentation is available here in
DVI or Postscript format.
These documents are no longer up-to-date, please use the
HTML documentation.
## Download

From the MeatAxe download page you can
download the current and older version of the MeatAxe.
*Note:* All files are source code packages.

## Links to other web sites

Matrix representations of finite simple groups in MeatAxe format
and more interesting stuff can be found at the
ATLAS of Finite Group
Representations.

Michael Ringe
(mringe@math.rwth-aachen.de),
17-Dec-98