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.