Main Branches

Downloads  Installation  Overview  Data Libraries  Packages  Documentation  Contacts  FAQ  GAP 3 

GAP 4.9.1

For an overview of changes in GAP 4.9.1 see file.

Linux and OS X

Download one of the archives below, unpack it and run ./configure; make in the unpacked directory. Then change to the pkg subdirectory and call ../bin/ to run the script which will build most of the packages that require compilation (provided sufficiently many libraries, headers and tools are available). For further details,see here. Expert users can find the description of all installation options in the file.

gap-4.9.1.tar.gz 348 MB sha256: aef5678090f542cac0f03df01d784acaa70f5d4acd8a94d1972c536a8533e504
gap-4.9.1.tar.bz2 288 MB sha256: d93abb263e6b9ce9f56bfb820ac263b9a0f349f6bd1584244c7b242931d0dd3a 374 MB sha256: 6bdb159257b4a238dbb14273fd3f0fcbec53d962a2cec83cb45dc8a0583db239

You may also consider one of the alternative distributions. Note, however, that these are updated independently and may not yet provide the latest GAP release.


We strongly recommend to use the .exe installer which contains binaries for GAP (compiled with the support of GMP and readline libraries) and for selected GAP packages, and provides the standard installation procedure. Note that the path to the GAP directory should not contain spaces. For example, you may install it in C:\gap-4.9.1 (default), D:\gap-4.9.1 or C:\Math\GAP\gap-4.9.1, but you must not install it in a directory named like C:\Program files\gap-4.9.1 or C:\Users\alice\My Documents\gap-4.9.1 etc.

gap-4.9.1-p1.exe 404 MB sha256: 28f67d3aa1b16c47552460a94acf33a0b15ca0037828b92f8afdbb560e57867e

The .exe installer should work for the majority of users. Alternatively (for example, if you don't have administrator's privileges on your Windows computer), you may use the archive and edit .bat files manually following instructions from the file. Furthermore, in case of technical problems with readline support under Windows (e.g. command line editing doesn't work, or GAP crashes at startup), we recommend to try the archive. 431 MB sha256: a52128e44ca5addc30cb410df3f85a0bd6c05b5ac3cbb0587ba6ca399c7d48b8 431 MB sha256: cb8480297111d91f2028cb9ba9173c526eb0cd15be91604c1d272ff64c2cd506

In addition, there is an experimental 64-bit version of GAP for Windows here: 437 MB sha256: eb9e2d1ccd08a678f55414b02dc4dfbd8fa2cbf584cd52ea3656422c29787691

Packages included in this release

Each of the GAP 4.9.1 archives contains the core GAP system (the source code, data libraries, regression tests and documentation), and the following selection of packages:

4ti2Interface 2017.10.04  04/10/2017  A link to 4ti2
ACE 5.2  11/03/2016  Advanced Coset Enumerator
AClib 1.3  11/03/2018  Almost Crystallographic Groups - A Library and Algorithms
Alnuth 3.1.0  01/12/2017  Algebraic number theory and an interface to PARI/GP
ANUPQ 3.2  29/11/2017  ANU p-Quotient
AtlasRep 1.5.1  30/03/2016  A GAP Interface to the Atlas of Group Representations
AutoDoc 2018.02.14  14/02/2018  Generate documentation from GAP source code
Automata 1.13  19/11/2011  A package on automata
AutomGrp 1.3  28/03/2016  Automata groups
AutPGrp 1.9  07/03/2018  Computing the Automorphism Group of a p-Group
Browse 1.8.7  21/07/2017  browsing applications and ncurses interface
CAP 2017.09.25  25/09/2017  Categories, Algorithms, Programming
Carat 2.2.2  28/03/2018  Interface to CARAT, a crystallographic groups package
Circle 1.6.1  25/09/2017  Adjoint groups of finite rings
cohomolo 1.6.6  02/12/2017  Cohomology groups of finite groups on finite modules
Congruence 1.2.2  06/02/2018  Congruence subgroups of SL(2,Integers)
Convex 2013.12.05  05/12/2013  A package for fan combinatorics
CoReLG 1.20  02/12/2014  computation with real Lie groups
Crime 1.4  01/6/2011  A GAP Package to Calculate Group Cohomology and Massey Products
CRISP 1.4.4  20/03/2016  Computing with Radicals, Injectors, Schunck classes and Projectors
Cryst 4.1.17  13/04/2018  Computing with crystallographic groups
CrystCat 1.1.8  09/02/2018  The crystallographic groups catalog
CTblLib 1.2.2  07/03/2013  The GAP Character Table Library
Cubefree 1.16  06/09/2016  Constructing the Groups of a Given Cubefree Order
cvec 2.6.0  20/03/2018  Compact vectors over finite fields
DESIGN 1.6  23/11/2011  The Design Package for GAP
Digraphs 0.12.1  26/04/2018  Graphs, digraphs, and multidigraphs in GAP
EDIM 1.3.3  30/01/2018  Elementary Divisors of Integer Matrices
Example 4.1.0  26/04/2018  Example/Template of a GAP Package
ExamplesForHomalg 2017.09.02  02/09/2017  Examples for the GAP Package homalg
FactInt 1.6.2  18/02/2018  Advanced Methods for Factoring Integers
FGA 1.4.0  23/03/2018  Free Group Algorithms
FinInG 1.4.1  31/03/2018  Finite Incidence Geometry
float 0.9.0  14/12/2017  Integration of mpfr, mpfi, mpc, fplll and cxsc in GAP
FORMAT 1.4a  19/03/2018  Computing with formations of finite solvable groups.
Forms 1.2.4  26/08/2017  Sesquilinear and Quadratic
FPLSA 1.2.2  04/02/2018  Finitely Presented Lie Algebras
FR 2.4.5  21/03/2018  Computations with functionally recursive groups
fwtree 1.1  08/03/2018  Computing trees related to some pro-p-groups of finite width
GAPDoc 1.6.1  28/11/2017  A Meta Package for GAP Documentation
Gauss 2018.04.03  03/04/2018  Extended Gauss functionality for GAP
GaussForHomalg 2018.02.05  05/02/2018  Gauss functionality for the homalg project
GBNP 1.0.3  08/03/2016  computing Gröbner bases of noncommutative polynomials
GeneralizedMorphismsForCAP 2017.09.09  09/09/2017  Implementations of generalized morphisms for the CAP project
genss 1.6.5  21/11/2017  Generic Schreier-Sims
GradedModules 2018.02.04  04/02/2018  A homalg based package for the Abelian category of finitely presented graded modules over computable graded rings
GradedRingForHomalg 2018.02.04  04/02/2018  Endow Commutative Rings with an Abelian Grading
GRAPE 4.7  08/01/2016  GRaph Algorithms using PErmutation groups
groupoids 1.55  02/02/2018  Calculations with finite groupoids and their homomorphisms
GrpConst 2.6  08/03/2018  Constructing the Groups of a Given Order
Guarana 0.94  27/04/2012  Applications of Lie methods for computations with infinite polycyclic groups
GUAVA 3.13  31/01/2016  a GAP package for computing with error-correcting codes
HAP 1.12.6  16/04/2018  Homological Algebra Programming
HAPcryst 0.1.11  27/10/2013  A HAP extension for crytallographic groups
hecke 1.4  02/07/2013  Hecke - Specht 2.4 ported to GAP 4
HeLP 3.3  11/12/2017  Hertweck-Luthar-Passi method.
homalg 2017.10.26  26/10/2017  A homological algebra meta-package for computable Abelian categories
HomalgToCAS 2018.03.19  19/03/2018  A window to the outer world
idrel 2.41  18/03/2018  Identities among relations
IntPic 0.2.3  14/09/2017  A package for drawing integers
IO 4.5.1  10/01/2018  Bindings for low level C library I/O routines
IO_ForHomalg 2017.09.02  02/09/2017  IO capabilities for the homalg project
IRREDSOL 1.4  03/08/2017  A library of irreducible soluble linear groups over finite fields and of finite primivite soluble groups
ITC 1.4  06/01/2004  Interactive Todd-Coxeter
json 1.2.0  10/10/2017  Reading and Writing JSON
kan 1.28  04/02/2018  including double coset rewriting systems
kbmag 1.5.5  04/02/2018  Knuth-Bendix on Monoids and Automatic Groups
LAGUNA 3.9.0  26/04/2017  Lie AlGebras and UNits of group Algebras
LieAlgDB 2.2  09/04/2018  A database of Lie algebras
LiePRing 1.9  11/03/2018  Database and algorithms for Lie p-rings
LieRing 2.3  01/11/2016  finitely presented Lie rings
linboxing 0.5.2  19/05/2011  access to LinBox linear algebra functions from GAP
LinearAlgebraForCAP 2017.09.09  09/09/2017  Category of Matrices over a Field for CAP
LocalizeRingForHomalg 2018.02.04  04/02/2018  A Package for Localization of Polynomial Rings
loops 3.3.0  26/10/2016  Computing with quasigroups and loops in GAP
lpres 0.4.2  08/12/2017  Nilpotent Quotients of L-Presented Groups
MapClass 1.2  24/04/2012  A Package For Mapping Class Orbit Computation
matgrp 0.4  25/02/2015  Matric Group Interface Routines
MatricesForHomalg 2018.04.06  06/04/2018  Matrices for the homalg project
ModIsom 2.3.3  08/01/2016  Computing automorphisms and checking isomorphisms for modular group algebras of finite p-groups
ModulePresentationsForCAP 2017.09.09  09/09/2017  Category R-pres for CAP
Modules 2018.03.20  20/03/2018  A homalg based package for the Abelian category of finitely presented modules over computable rings
Nilmat 1.3  12/09/2017  Computing with nilpotent matrix groups
NormalizInterface 1.0.2  03/12/2017  GAP wrapper for Normaliz
nq 2.5.3  08/03/2016  Nilpotent Quotients of Finitely Presented Groups
NumericalSgps 1.1.7  19/03/2018  A package for numerical semigroups
OpenMath 11.4.2  28/02/2017  OpenMath functionality in GAP
orb 4.8.0  10/11/2017  Methods to enumerate Orbits
PatternClass 2.4.1  28/09/2017  A permutation pattern class package
permut 2.0.1  18/02/2018  A package to deal with permutability in finite groups
Polenta 1.3.8  29/11/2017  Polycyclic presentations for matrix groups
Polycyclic 2.13.1  27/04/2018  Computation with polycyclic groups
PolymakeInterface 2015.01.26  26/01/2015  A package to provide algorithms for fans and cones of polymake to other packages
polymaking 0.8.1  16/11/2013  Interfacing the geometry software polymake
PrimGrp 3.3.1  17/02/2018  GAP Primitive Permutation Groups Library
profiling 2.0.0  29/03/2018  Line by line profiling and code coverage for GAP
qaos 1.6  28/03/2018  Interfacing the QaoS database from GAP
QPA 1.27  16/12/2017  Quivers and Path Algebras
QuaGroup 1.8  16/08/2013  a package for doing computations with quantum groups
RadiRoot 2.8  23/04/2018  Roots of a Polynomial as Radicals
RCWA 4.6.1  18/12/2017  Residue-Class-Wise Affine Groups
RDS 1.6  16/02/2012  A package for searching relative difference sets
recog 1.2.5  08/03/2016  A collection of group recognition methods
recogbase 1.2.5  08/03/2016  A framework for group recognition
Repsn 3.0.2  25/08/2011  A GAP4 Package for constructing representations of finite groups
ResClasses 4.7.1  18/12/2017  Set-Theoretic Computations with Residue Classes
RingsForHomalg 2018.04.04  04/04/2018  Dictionaries of external rings
SCO 2017.09.10  10/09/2017  SCO - Simplicial Cohomology of Orbifolds
SCSCP 2.2.3  24/09/2017  Symbolic Computation Software Composability Protocol in GAP
Semigroups 3.0.15  24/03/2018  A package for semigroups and monoids
SglPPow 2.1  08/03/2018  Database of groups of prime-power order for some prime-powers
SgpViz 0.999.1  13/09/2017  A package for semigroup visualization
simpcomp 2.1.8  05/02/2018  A GAP toolbox for simplicial complexes
singular 12.04.28  28/04/2012  The GAP interface to Singular
SLA 1.4  24/04/2018  a package for doing computations with simple Lie algebras
SmallGrp 1.3  09/04/2018  The GAP Small Groups Library
Smallsemi 0.6.11  26/04/2017  A library of small semigroups
SONATA 2.8  29/07/2015  System of nearrings and their applications
Sophus 1.24  09/04/2018  Computing in nilpotent Lie algebras
SpinSym 1.5  01/02/2013  Brauer tables of spin-symmetric groups
SymbCompCC 1.3  20/03/2018  Computing with parametrised presentations for p-groups of fixed coclass
TomLib 1.2.6  07/11/2016  The GAP Library of Tables of Marks
ToolsForHomalg 2018.01.30  30/01/2018  Special methods and knowledge propagation tools
Toric 1.9.4  07/03/2017  toric varieties and some combinatorial geometry computations
ToricVarieties 2012.12.22  22/12/2012  A package to handle toric varieties
TransGrp 2.0.2  13/11/2017  Transitive Groups Library
Unipot 1.4  09/04/2018  Computing with elements of unipotent subgroups of Chevalley groups
UnitLib 4.0.0  01/05/2018  Library of normalized unit groups of modular group algebras
utils 0.54  12/02/2018  Utility functions in GAP
Wedderga 4.9.3  30/04/2018  Wedderburn Decomposition of Group Algebras
XGAP 4.27  21/03/2018  a graphical user interface for GAP
XMod 2.68  01/05/2018  Crossed Modules and Cat1-Groups
XModAlg 1.16  29/01/2018  Crossed Modules and Cat1-Algebras
ZeroMQInterface 0.10  02/03/2018  ZeroMQ bindings for GAP