GAP 4 Package Wedderga

Central Idempotents and Simple Components of Group Algebras 

Mirrors 


The title Wedderga stands for Wedderburn decomposition of group algebras. This is a GAP package to compute the simple
components of the Wedderburn decomposition of semisimple group algebras
of finite groups over abelian number fields and over finite fields. It
also contains functions that compute the primitive central idempotents
of the same kind of group algebras, and to construct crossed products
over a group with coefficients in an associative ring with identity and
the multiplication determined by a given action and twisting.
The Wedderga package was
submitted for consideration to the GAP Council on September 25, 2006.
The package became accepted since the version 4.3.3 released on May 29, 2008.



Copyright 
(C)
2006 by Ángel del Río, Osnel Broche Cristo, Alexander
Konovalov, Aurora Olivieri and Gabriela Olteanu. For use and distribution of this software, we adopt the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. For details, see the text of the license at FSF's own site http://www.gnu.org/licenses/gpl.html. 
Documentation

Wedderga documentation is a
part of its distribution (see next section). To preview the
documentation, select one of the following formats:
The file
PackageInfo.g with Wedderga package
metainformation used by GAP 4.4 package loading mechanism is located here. 
Downloads

Wedderga
is designed for GAP4.4 and
no
compatibility with previous releases of GAP4 is guaranteed. It does not use
external binaries and, therefore, works without restriction on type of
the opearting system.
To use the Wedderga online help it is necessary to install the GAP4 package GAPDoc by Frank Luebeck and Max Neunhoeffer, which is available from the GAP homepage or from http://www.math.rwthaachen.de/~Frank.Luebeck/GAPDoc/.

Wedderga Bibliography 
We maintain a list of references to the
Wedderga package. It contains works where the
Wedderga package was cited.
We will appreciate your additions or corrections to this list sent
to one of the Wedderga authors.
If you publish a result that was partially obtained with the help of Wedderga, please cite it in the following form: [Wedderga] 
Acknowledgments 
On
various stages the development of the Wedderga package was
supported
by the following institutions:

Last updated: 29 May, 2009
