A Computer algebra package for Lie group computations
LiE is a computer algebra system that is specialised in computations
involving (reductive) Lie groups and their representions. Four descriptions
of the package are available:
Version 2.2 Now a new version, 2.2 is released. Marc van Leeuwen
has made this version from 2.0 by streamlining the source code; the main
results are the disappearance of some mathematical and memory bugs, a CWEBx documentation for
most of the source code, and more or less the same functionality (an
exception being the characters of the symmetric group, which have now become
polynomials). The changes since version 2.1 are minimal to the user: the
main difference is that `lex' is no longer used to build a lexical analyser,
which improves portability and allows for a slightly more liberal lexical
Since July 1996, LiE is publically available for free.
There are various versions of the software you may obtain:
If you want to try out some computations with LiE without having to
install it, you can invoke LiE through the WWW, by simply filling in a
form, and the result will be displayed.
If you want to compile and run the program, but need no documentation of the
source files, you can fetch the tarfile for a
compile only version.
You can also get a much more documented version of the source files,
which use the CWEBx software documentation system. To use this
version you need to download and compile the
CWEBx system in
addition to the
documented sources for
Detailed instruction of how to install each of these versions can be
found in the README files contained in the individual tarfiles.