ATLAS of Finite Group Representations

Version 1

This ATLAS of Group Representations has been prepared by Robert Wilson, Peter Walsh, Jonathan Tripp, Ibrahim Suleiman, Stephen Rogers, Richard Parker, Simon Norton, Steve Linton and John Bray (in reverse alphabetical order, because I'm fed up with always being last!).

This page has been accessed times since 12th December 2000 - the last time the counter was reset after a powercut (typical!).
(Between 2nd August 1999 and 12th December 2000 there were at least 15373 accesses.)

Version 1

This website has been under continuous development for several years now, growing from a few hundred representations in 1996 to well over two thousand in 2000. Most have been constructed by the authors - these range from trivial applications of the Meataxe to major research projects lasting weeks or months. A few have been collected from other people - specific references are given on the appropriate web pages. Dates of last updates to the files can be ascertained via the ftp access described below, using the command "ls -l".

As of December 2000, no development work is being done on this Version 1. New material will appear in Version 2 only. For the moment, version 2 comes with a warning: USE AT YOUR OWN RISK! It is incomplete, and has not been properly checked, and definitely contains mistakes. Currently most of the sporadic, alternating, symplectic and exceptional groups are implemented, while the linear, orthogonal and unitary groups mostly are not. More details of the current status may be found on this page.

Version 2

Among the advantages of version 2 are:

What's new - last updated 20th December 2000.


This ATLAS contains representations of many finite simple groups and related groups such as covering groups and automorphism groups of simple groups. Other resources/links include:
Last updated 20th December 2000.

R.A.Wilson (
R.A.Parker (
J.N.Bray (