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Science: Math: Algebra: Group_Theory

Abstract groups
The abstract group concept. Material based on lectures by Peter Neumann.

ArXiv Front: GR Group Theory
Group theory section of the mathematics e-print arXiv.

Binary Coordinate Systems
Article by Steven H. Cullinane. Defines "Cartesian" coordinate systems for small finite geometries over the two-element field, and discusses geometrically simple generators for affine group actions.

Broue's Abelian Defect Group Conjecture
A record of which groups and blocks have been proved to satisfy the conjecture, maintained by Jeremy Rickard.

Common Systems of Coset Representatives
Proof of existence of a common system of representatives for the left and right cosets of a finite subgroup of a group by Ashay Dharwadker.

Computational Tools for Group Theory
Describes work to create a program that could be used to generate, identify, and analyze finite groups presented in the form of a Cayley Table as well as visualize the groups that are generated.

Coxeter/Weyl Tutorial
A Tutorial Introduction to the Coxeter and Weyl Packages, a pair of Maple packages for working with root systems, finite Coxeter groups and Weyl characters

GAP - Groups, Algorithms and Programming
GAP is a free system for computational discrete algebra.

Group Action Forum
Association for the study of the theory of transformation groups and related topics. Members, news, events, publications.

Group Pub Forum Home Page
These are the community pages for Group Theory, the mathematics of symmetry. Group Theory is a branch of algebra, but has strong connections with almost all parts of mathematics.

Group Theory
On-line book by Prederic Cvitanovic. Available both in 'psd' and 'ps' formats.

International Society for Group Theory in Cognitive Science
Group theory in: Robotics, Problem-Solving, Planning, Learning, Language, Perception, Art, Design, Engineering, Manufacturing, Epistemology, Measurement, Computation, Neuroscience, Anthropology, Semiotics.

Introduction to Group Theory
A fairly easy to understand tutorial. Fourteen sections, including groups, Cayley tables, subgroups, cosets, Lagrange's theorem, cyclic groups and subgroups, permutations, and Rubik's cube.

The Lie algebras su(N), an introduction
Publication: An Introduction to the Lie Algebras su(N). By Walter Pfeifer, Switzerland. A free copy can be ordered.

Mod-2 Cohomology of 2-Groups
Computer calculation of the mod-2 cohomology of groups of order 8, 16, 32 and 64.

The Moonshine Page
Bibliography, meetings.

New York Group Theory Cooperative
Software (Magnus), preprints, meetings, links. Magnus - a graphically-oriented system for computational group theory - allows one to explore and experiment with abstract groups without the need for learning yet another programming language. Magnus is freely available software (GPL) based on Tcl/Tk.

Open Problems in Group Theory
Part of the Magnus project. Contains over 150 problems in group theory, both well known and relatively new.

Papers by R. E. Borcherds
Including proof of the Moonshine Conjecture (TeX, DVI, PDF).

Parallel GAP/MPI (ParGAP/MPI), a share package for GAP. UNIX (or Cygwin/Windows). Download source and documentation by FTP.

Permutation Group Problems
Compiled by Peter Cameron.

Permutation Groups Resources
Web-based resources for permutation groups and related areas in group theory and combinatorics.

Semigroup Theory
Directory of home pages and conferences maintained at Southampton University.

Symmetric Presentations
Some presentations of groups (symmetric or otherwise).

The main point group symmetries of interest to defect physics by operation (reflection, rotations etc) and classification (trigonal, and cubic). Most point groups also have the associated character table on-line.

Symmetry Groups in Maple V
A worksheet by W.D. Joyner.

Topological Methods in Group Theory
Table of contents only; draft chapters can be downloaded by arrangement.

Trinomials with Interesting Galois Groups
Parametrisation of trinomials with Galois groups contained in the simple group G168.

The World of Groups
Part of the World Wide Algebra project. Open problems in combinatorial group theory, a list of personal web pages, conferences and seminars, and useful links.


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