https://github.com/bh11/crisp
Tip revision: ddfe634bda11559b9072fd3ad9bfd9f913f3164e authored by bh11 on 15 December 2022, 21:10:22 UTC
update version info
update version info
Tip revision: ddfe634
README.in.txt
The CRISP package
Version CRISP_VERSION
CRISP_DATE
The GAP package CRISP provides algorithms for computing subgroups of
finite soluble 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 soluble group, its characteristic subgroups, and the socle and
p-socles for given primes p.
This version of CRISP requires at least GAP 4.5.
In order to install CRISP, you have to get the current package archive file
'crisp-CRISP_VERSION.tar.bz2',
or any other package format suitable for your system.
You can download the current package archive from the packages section of
www.gap-system.org.
To install CRISP, move the downloaded package archive file into the
`pkg' directory in which you plan to install CRISP. Usually, this will be
the directory 'pkg' in the GAP directory.
Then decompress the package archive. You should now have a directory
'crisp-CRISP_VERSION' in the 'pkg' directory. That's all. By default,
CRISP is automatically loaded when you start GAP, and should be listed
among the loaded packages.
If you already have a previous version of CRISP, you can delete that
directory.
To load the CRISP package manually, type
LoadPackage ("crisp");
at the GAP prompt. If everything is ok, this should return `true'.
The development version of CRISP is available via GitHub, at
https://github.com/bh11/crisp.git.
Please do not hesitate to report any bugs or other problems/suggestions
via the GitHub issue tracker at https://github.com/bh11/crisp/issues">
or by e-mail to the author.
Burkhard Höfling
WWW: http://www.icm.tu-bs.de/~bhoeflin
e-mail: b.hoefling@tu-bs.de