GAP package CRISP

Computing with Radicals, Injectors, Schunck classes and Projectors

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Author

Burkhard Höfling

Short Description

The GAP package CRISP provides algorithms for computing subgroups of finite solvable groups related to a group class C. In particular, it allows to compute C-radicals and C-injectors for Fitting classes (and Fitting sets) C, C-residuals for formations C, and C-projectors for Schunck classes C. In order to carry out these computations, the group class C must be represented by an algorithm which can decide membership in the group class.

Moreover, CRISP contains algorithms for the computation of normal subgroups invariant under a prescribed set of automorphisms and belonging to a given group class.

This includes an improved method to compute the set of all normal subgroups of a finite solvable group, its characteristic subgroups, minimal normal subgroups and the socle and p-socles for given primes p.

Version

Current version number 1.3.4   (Released 26/05/2011)

Status

accepted    (communicated by Joachim Neubüser (Aachen), accepted 12/2000)

Dependencies

GAP version: >=4.4.12

Online documentation

CRISP: [ HTML] version   [ PDF] version  

Download

[README]    crisp-1r3n4[.zoo  (356K)]   [.tar.gz  (312K)]   [-win.zip  (356K)]   [.tar.bz2  (292K)]  

Contact

Burkhard Höfling
WWW: http://www-public.tu-bs.de:8080/~bhoeflin
E-mail: b.hoefling@tu-bs.de