Polycyclic

Computation with polycyclic groups

Version 2.15.1
Released 2019-10-03

This project is maintained by Bettina Eick, Max Horn

Build Status Code Coverage

The GAP 4 package `Polycyclic’

Introduction

This is the package Polycyclic written for GAP 4. It provides a basis for working with polycyclic groups defined by polycyclic presentations.

To have the full functionality of the package available you need at least GAP version 4.5 and the GAP 4 package Alnuth and its dependencies must be installed.

The features of this package include

There is a manual in the subdirectory doc which describes the available functions in detail.

If you have used Polycyclic, and found important features missing or if there is a bug, we would appreciate it very much if you could report this via https://github.com/gap-packages/polycyclic/issues, or by sending us an email.

Contents

With this version you should have obtained the following files and directories:

Installation

Make sure that the GAP 4 package Alnuth is installed to have the full range of methods available in polycyclic.

There are two ways of installing the package. If you have permission to add files to the installation directory of GAP 4 on your system, you may install polycyclic in the pkg subdirectory of the GAP installation tree. If you do not, you can also install polycyclic in a directory where you have write permissions. For general advice, see also the GAP 4 manual about the installation of GAP packages.

Installation in the GAP 4 pkg subdirectory on a Unix system.

We assume that the archive file polycyclic.tar.gz or polycyclic.tar is present in pkg and that the current directory is pkg. All that needs to be done is to unpack the archive.

tar xzf polycyclic.tar.gz 

The tar-command has unpacked the code into a directory called polycyclic in the current directory. You can check if GAP recognizes the polycyclic package by starting GAP and doing the following:

$ gap4
[... startup messages ...]
gap> LoadPackage("polycyclic");
true
gap>     

Installation in a private directory

Let’s say you would like to install polycyclic in a directory called mygap. Create a subdirectory pkg in mygap and move the polycyclic archive into that subdirectory.

cd mygap
mkdir pkg
mv polycyclic.tar.gz pkg
cd pkg
tar xzf polycyclic.tar.gz

The tar-command has unpacked the code into a directory called polycyclic in the current directory. You can check if GAP recognizes the polycyclic package by starting GAP and doing the following. GAP needs to be told that it should scan the directory mygap/pkg for GAP packages. This is achieved by calling gap with the option -l. Note the semicolon and the single quotes.

$ gap4 -l ';mygap/'
[... startup messages ...]
gap> LoadPackage("polycyclic");
true
gap>