https://github.com/bh11/crisp
Tip revision: ddfe634bda11559b9072fd3ad9bfd9f913f3164e authored by bh11 on 15 December 2022, 21:10:22 UTC
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update version info
Tip revision: ddfe634
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<TITLE>GAP Package "CRISP"</TITLE>
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<IMG src="logo.png" alt="CRISP">
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<H2>
A GAP 4 package for <BR>
Computing with Radicals, Injectors<BR>
Schunck classes and Projectors<BR>
of finite soluble groups
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<DL>
<DT>Author:
<DD> <a href="http://www.icm.tu-bs.de/~bhoeflin/">Burkhard Höfling</A>,
e-mail: firstinitial.lastname@tu-bs.de replacing ö by oe
<BR>
<DT>Language:
<DD> GAP (requires at least Version 4.5) <BR>
<DT>Operating System:
<DD> any <BR>
<DT>Current version:
<DD> CRISP_VERSION
<DT>Download:
<DD> <A href="crisp-CRISP_VERSION.tar.bz2">crisp-CRISP_VERSION.tar.bz2</a> in .tar.bz2 format <BR>
Other formats available from <a href="http://www.gap-system.org/Packages/crisp.html">the CRISP page on the main GAP server.</a></EM>
<DT>Home page:
<DD><a href="http://www.icm.tu-bs.de/~bhoeflin/crisp/index.html">http://www.icm.tu-bs.de/~bhoeflin/crisp/index.html</A>
</DD>
<DT>
CRISP manual
</DT>
<DD> Available in
<A href="http://www.gap-system.org/Manuals/pkg/crisp/html/chapters.htm">HTML</A> format
<A href="http://www.gap-system.org/Manuals/pkg/crisp/doc/manual.pdf">Adobe Acrobat PDF</A> format
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<DT>
Development version
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<DD>
Accessible via <A href="https://github.com/bh11/crisp.git">GitHub repository</A>
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<DT>
Bugs and suggestions
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<DD>
<A href="https://github.com/bh11/crisp/issues">GitHub issue tracker</A> or by e-mail to the author.
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Description
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<P>
The GAP package CRISP provides algorithms for computing subgroups of
finite soluble groups related to group classes. In particular, it allows to compute <B>F</B>-radicals and <B>F</B>-injectors for Fitting classes (and Fitting sets) <B>F</B>, <B>F</B>-residuals for formations <B>F</B>, and <B>X</B>-projectors for Schunck classes <B>X</B>. In order to carry out these computations, the group
classes <B>F</B> and <B>X</B>must be given by an
algorithm which decides membership in the group class. </P>
<P>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
<i>p</i>-socles for given primes <i>p</i>.</P>
<ADDRESS>
Author: Burkhard Höfling<BR>
Last modified: CRISP_DATE
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