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.

The GAP team                                       March 2024                                             GAP(1)