GAP 3 Deposited Contributions

See also the corresponding GAP 4 page.

Over the years several pieces of code for GAP 3 have been made available by users of GAP 4 to other users. You can find these in the '

The routines provided on this page are user contributions that have not been checked in any way by the GAP team. So while we will try to help where we can we may be unable to do so.

1. AbStab.g, AbStab.doc
   representing elements of a permutation group in terms of its generators,
   by Philip Osterlund, about Feb 1994
2. stamp.g, stamp.doc
   routines for computing in very large permutation groups,
   by Steve Linton, about Mar 1994
3. WeylMod.g, WeylMod.doc
   routines working with representations of simple complex Lie algebras, providing:
   + definitions of Killing form for all finite simple Lie algebras, and all affine Lie algebras (Kac-Moody algebras), both direct and twisted.
   + Weyl's equation for the dimension of a representation given its highest weight.
   + Freudenthal's recursive algorithm to generate all weights and multiplicities of a representation given its highest weight,
   by Jacob Hirbawi, about Mar 1994
4. ctpg.g, ctpgexam.g
   GAP 3.3 functions to compute the abelian invariants of the complete preimage of a subgroup of a homomorphic image of a finitely presented group,
   by Werner Nickel, about Jul 1994
5. semigroup.g, semigroup.doc
   semigroup functions,
   by Marcel Widi, contact Tim Boykett, about Sep 1994
6. IRTransversal.g
   functions for looping through a list of right coset representatives for a permutation group modulo some subgroup, but without producing such a list,
   by Frank Luebeck, about Nov 1994 (?)
7. coco.grp, coco.tex
   function for constructing the primitive permutation representations of the simple groups of order less than 10^6, except for the two-dimensional linear groups,
   converted by Heiko Theißen, from COCO format to GAP, about Jul 1995
8. moddist.tar.z
   routines for computing with modules over matrix group # algebras,
   by Michael J. Smith, about Nov 1995 (?)
9. formation.tar.gz
   definition and handling of formations, formation-theoretic subgroups of finite soluble groups, i.e. F-residual subgroups, F-normalizers, and F-covering subgroups,
   by Bettina Eick, about Dec 1995
10. groupring,
    functions for group rings,
    by Philip Osterlund, about Feb 1996
11. glatcc-1.0.tar.gz,
    patch for XGAP 1.3 to support lattices of conjugacy classes,
    by Franz Gähler, about Mar 1996
12. notting.g
    a function to compute finite factors of the Nottingham groups over fields of prime order,
    by Levente Levai, about Sep 1996
13. approx.g,
    functions to compute rational approximations for cyclotomic field elements,
    by Sebastian Egner, about Sep 1996
14. presepi.g,
    search for epimorphism(s) from a finitely presented group onto a permutation group,
    by Levente Levai, about Sep 1996
15. embedsub.g,
    routines for testing embedding properties like pro-/ab-/paranormality,
    by Vitaliy Mysovskikh, May 1997
16. decimal.g,
    complex.g,
    Routines for fixed precision floating point real and complex arithmetic
    by Jean Michel, May 1997
17. ONE.zoo,
    A set of functions supporting computation of orbits on modules restricted from irreducible C-modules
    by K. Magaard, S.Shpectorov, Sep 97
18. invling.g,
    A function to check if a graph is a line graph (needs GRAPE),
    by Dima Pasechnik, Oct 1997
19. lag.g,
    LAG - Lie Algebras of Group Algebras
    by Richard Rosmanith, Nov 1997
20. cosettab.zoo,
    Functions to compute a coset table if a permutation image is already given. The archive contains a worked example.
    by V. Felsch, J. Neubüser, Feb 1998
21. maxsolgroup.g,
    Library of maximal solvable subgroups of a prime degree special linear group.
    by Alla Detinko, Mar 1998
22. gpl.g and gpl.ps.gz,
    Library of presentations of groups related to sporadic simple groups, words for generators of subgroups of interest and associated utility functions.
    by Roderik Lindenbergh, Oct 1998
23. PrimitiveInvariant.g
    Contains programs to compute primitive invariants, polynomials that characterize subgroups of the symmetric group and that are of use in Galois theory.
    by Ines Abdeljaouad, December 1999.

Documentation

1. nrsg.diss.ps.gz, Documentation about nearring functions,
   by C.Nöbauer, contact Tim Boykett, about Aug 1995
2. xgap1r3-dvi.zoo
   DVI-File of the XGAP manual
   by Frank Celler, April 1997

External programs and Interface routines

1. gap.m, math.g, gapmath.doc
   translator: GAP to Mathematica and Mathematica to GAP,
   by Sebastian Egner, about Apr 1994

Utilities

1. emacs-gap-mode-1.96.tar.gz, emacs-gap-mode.readme
   GAP mode for emacs,
   by Michael J. Smith, about Feb 1993
2. fisk.zoo
   translator: GAP manual to EMACS info format,
   by Steve Fisk, about Aug 1994
3. split.zoo, split-merge.doc
   splits and merges large files into smaller pieces, useful when transferring files on floppy disk,
   uploaded by Steve Linton, about Nov 1995