GAP Package IMG

The IMG package allows GAP to manipulate iterated monodromy groups

The current version of this package is version 0.3.3, released on 2022-09-19. For more information, please refer to the package manual. There is also a README file.

License: GPL-2.0-or-later

Dependencies

This package requires GAP version >=4.6.0. The following GAP packages are needed:

• FR, version at least 2.4.0.

The following additional GAP packages are not required, but suggested:

• Float, version at least 0.9.0. It is only necessary for high-precision (greater than 64-bit IEEE754) calculations

Note also that IMG interacts with a GUI that displays interactively Julia sets on the sphere; it is included in the tarball, but has to be added manually if you clone the git IMG repository. Do this with git clone https://github.com/laurentbartholdi/rsserver.git in the root directory of IMG.

Installation (MacOS)

Installation has been tested with homebrew and macports. You definitely will need at least one of them. It is assumed that you already have a running installation of GAP, either packaged or self-compiled.

• Download or clone the latest version of this package in $HOME/Library/Preferences/GAP/pkg (you may need to create the directory beforehand)
• For homebrew: brew install cmake suite-sparse imagemagick node; for macports: port install cmake SuiteSparse ImageMagick nodejs17
• go to the root of the package ($HOME/Library/Preferences/GAP/pkg/img for example)
• ./configure --with-gaproot=<root> --with-cholmod=<cholmod-root>; here <root> is typically /opt/local/Cellar/gap/4.11.1/libexec and <cholmod-root> is typically /opt/local
• make

Installation (Linux)

Lukas Geyer has kindly contributed detailed instructions.

Author

Laurent Bartholdi

Feedback

For bug reports, feature requests and suggestions, please use the issue tracker.