GAP
Section: User Commands (1)
Updated: November 2022
Index
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NAME
GAP - Groups, Algorithms and Programming
SYNOPSIS
gap
[,OPTIONS/] [,FILES/]
DESCRIPTION
GAP is a system for computational discrete algebra, with particular emphasis
on Computational Group Theory. GAP provides a programming language, a library
of thousands of functions implementing algebraic algorithms written in the GAP
language as well as large data libraries of algebraic objects. GAP is used in
research and teaching for studying groups and their representations, rings,
vector spaces, algebras, combinatorial structures, and more.
Startup:
- -h, --help
-
print this help and exit
- --version
-
print the GAP version and exit
- --print-gaproot
-
print the primary GAP root and exit
- -b, --banner
-
disable/enable the banner
- -c
-
<expr> execute the expression <expr>
- --systemfile
-
<file> read this file after 'lib/system.g'
Input/output:
- -q, --quiet
-
enable/disable quiet mode
- -e
-
disable/enable quitting on <ctrl>-D
- -f
-
force line editing
- -n
-
prevent line editing
- -E, --readline
-
disable/enable use of readline library (if
possible)
- -x, --width
-
<num> set line width
- -y, --lines
-
<num> set number of lines
- -p
-
enable/disable package output mode
(for use by XGAP and similar interfaces)
Memory:
-
(may use postfix 'k' = *1024, 'm' = *1024*1024,
-
'g' = *1024*1024*1024):
- -g, --gasinfo
-
show GASMAN messages (full/all/no garbage
collections)
(only available if GAP uses GASMAN)
- -m, --minworkspace
-
<mem> set the initial workspace size
- -o, --maxworkspace
-
<mem> set workspace size where GAP will warn about
excessive memory usage (GAP may allocate more)
(only available if GAP uses GASMAN)
- -K, --limitworkspace <mem>
-
set maximal workspace size (GAP never
allocates more)
- -s
-
<mem> set the initially mapped virtual memory
(only available if GAP uses GASMAN)
Roots:
- -l, --roots
-
<paths> set or modify the GAP root paths
Directories are separated using ';'.
Putting ';' on the start/end of list appends
directories to the end/start of existing list
of root paths
- -r
-
disable/enable user GAP root dir
GAPInfo.UserGapRoot
Loading:
- -A
-
disable/enable autoloading of suggested
GAP packages
- -D
-
enable/disable debugging the loading of files
- -M
-
disable/enable loading of compiled modules
Error handling, REPL:
- -T, --nobreakloop
-
disable/enable break loop and error traceback
- --alwaystrace
-
always print error traceback
(overrides behaviour of -T)
- --quitonbreak
-
quit GAP with non-zero return value instead
of entering break loop
- --norepl
-
Disable the GAP read-evaluate-print loop (REPL)
- --nointeract
-
Start GAP in non-interactive mode (disable REPL
and break loop)
Workspaces:
-
(only available if GAP uses GASMAN)
-L <file> restore a saved workspace
-R prevent restoring of workspace (ignoring -L)
Profiling:
- --prof
-
<file> Run ProfileLineByLine(<file>) on GAP start
- --memprof
-
<file> Run ProfileLineByLine(<file>) on GAP start
with recordMem := true
- --cover
-
<file> Run CoverageLineByLine(<file>) on GAP start
Internal developer tools
- -N
-
do not use hidden implications
- -O
-
disable/enable loading of obsolete files
- --bare
-
Attempt to start GAP without even needed
packages
-
Boolean options toggle the current value each time they are called.
Default actions are indicated first.
AUTHORS
The GAP Group <http://www.gap-system.org>
COPYRIGHT
Copyright (1988--2020) by its authors.
GAP is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
SEE ALSO
gac(1)
update-gap-workspace(1)
You can read the complete manual in /usr/share/gap/doc or you can use the online help system. Type ?help inside GAP to access it.
Type
?Reference: options!under UNIX
to access the full documentation of options.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- Startup:
-
- Input/output:
-
- Memory:
-
- Roots:
-
- Loading:
-
- Error handling, REPL:
-
- Workspaces:
-
- Profiling:
-
- AUTHORS
-
- COPYRIGHT
-
- SEE ALSO
-
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Time: 18:37:40 GMT, April 27, 2024