The GAP 4 package `SgpViz' ================================== Introduction ------------ This is release 0.998 of the package `SgpViz'. The features of this package include - drawing the D-Classes of a semigroup and the D-Class of an element of a semigroup; - computing a minimal factorization of an element of semigroup in the generators; - drawing the Schutzenberger graphs of an inverse semigroup; - computing the right Cayley graph of a semigroup; - a Tcl/Tk interface to specify a semigroup; There is a manual in the sub-directory 'doc' written using the GAP package gapdoc which describes the available functions in detail. The dvi, pdf, html versions of the manual are also available there. If you have used this package, please let us know by sending us an email. If you have found important features missing or if there is a bug, we would appreciate it very much if you send us an email. Manuel Delgado <mdelgado@fc.up.pt> José Morais <josejoao@fc.up.pt> Contents -------- With this version you should have obtained the following files and directories: README this file EXAMPLES some examples doc the manual gap the GAP code init.g the file that initializes this package read.g the file that reads in the package PackageInfo.g information file for automatic processing version the version number Unpacking --------- You may get `SgpViz' as a compressed tar archive (file name ends with .tar.gz). Use the appropriate command on your system to unpack the archive. On UNIX systems the compressed tar archive may be unpacked by tar xzf sgpviz-<version>.tar.gz or, if tar on your system does not understand the option z, by gunzip sgpviz-<version>.tar.gz tar xf sgpviz-<version>.tar which will in each case unpack the code into a directory 'sgpviz' in the current directory. We assume that the current directory is the directory /usr/local/lib/gap4r4/pkg/. Installation ------------ Important: ---------- This package needs the package `Automata' (http://www.gap-system.org/~gap/Packages/automata.html). ----------------------------------------- You may have to start GAP with the -l option, for instance, gap -l "/usr/local/lib/gap4r4" Then try the following gap> LoadPackage( "sgpviz" ); true gap> Good luck! If you use a LINUX system, you may have to, in order to save typing, write aliases: in the file `.bashrc' (or something equivalent, maybe with another syntax): alias gap='gap -l "/usr/local/lib/gap4r4;"' and in the file `.gaprc' LoadPackage( "sgpviz" ); GraphViz (http://www.graphviz.org/) should be installed. Tcl/Tk should also be installed. ---------- In other systems, there are equivalent ways to do the same.