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GAP package CRISP
License: Other
This project forked from bh11/crisp
GAP package CRISP
License: Other
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: [email protected]
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