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GAP package Wedderga

Wedderburn Decomposition of Group Algebras

Authors

Osnel Broche Cristo, Allen Herman, Alexander Konovalov, Gabriela Olteanu, Aurora Olivieri, Angel del Rio, Inneke Van Gelder

Short Description

Wedderga is the package to compute the simple components of the Wedderburn decomposition of semisimple group algebras of finite groups over finite fields and over subfields of finite cyclotomic extensions of the rationals. It also contains functions that produce the primitive central idempotents of semisimple group algebras and functions for computing Schur indices. Other functions of Wedderga allow one 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.

Version

Current version number 4.7.3   (Released 18/09/2015)

Status

accepted    (communicated by Gerhard Hiss (Aachen), accepted 01/2008)

Dependencies

GAP version: >=4.7
Needed other packages: GAPDoc(>= 1.5.1),
Suggested other packages: laguna(>= 3.4), GUAVA(>= 3.12),

Online documentation

Wedderga: [ HTML] version   [ PDF] version  

Download

[README]    wedderga-4.7.3[.tar.gz  (780K)]   [.tar.bz2  (676K)]   [-win.zip  (832K)]   [.zip  (832K)]  

Contact

Osnel Broche Cristo
Address:
Departamento de Ciências Exatas
Universidade Federal de Lavras - UFLA
Campus Universitário - Caixa Postal 3037
37200-000, Lavras - MG, Brazil
E-mail: osnel@ufla.br

Allen Herman
Address:
Department of Mathematics and Statistics
University of Regina
3737 Wascana Parkway
Regina, SK, S0G 0E0 Canada
E-mail: aherman@math.uregina.ca

Alexander Konovalov
Address:
School of Computer Science
University of St Andrews
Jack Cole Building, North Haugh,
St Andrews, Fife, KY16 9SX, Scotland
WWW: http://www.cs.st-andrews.ac.uk/~alexk/
E-mail: alexk@mcs.st-andrews.ac.uk

Gabriela Olteanu
Address:
Department of Statistics-Forecasts-Mathematics
Faculty of Economics and Business Administration
Babes-Bolyai University
Str. T. Mihali 58-60, 400591 Cluj-Napoca, Romania
WWW: http://math.ubbcluj.ro/~olteanu
E-mail: gabriela.olteanu@econ.ubbcluj.ro

Aurora Olivieri
Address:
Departamento de Matemáticas
Universidad Simón Bolívar
Apartado Postal 89000
Caracas 1080-A, Venezuela
E-mail: olivieri@usb.ve

Angel del Rio
Address:
Departamento de Matemáticas
Universidad de Murcia
30100 Murcia, Spain
WWW: http://www.um.es/adelrio
E-mail: adelrio@um.es

Inneke Van Gelder
Address:
Vrije Universiteit Brussel
Departement Wiskunde
Pleinlaan 2
1050 Brussels , Belgium
WWW: http://homepages.vub.ac.be/~ivgelder
E-mail: ivgelder@vub.ac.be