The GAP 4 package TwistedConjugacy

About

The TwistedConjugacy package provides methods to calculate Reidemeister classes, numbers, spectra and zeta functions, as well as coincidence groups of group homomorphisms. These methods are, for the most part, designed to be used with (group homomorphisms between) finite groups and, if the package Polycyclic is also installed, polycyclically presented groups.

This package requires GAP version 4.12 or later.

Additionally, this package provides extra functionality if Polycyclic version 2.16 or later is installed.

It is recommendeded to install the latest version Polycyclic, as some known bugs in older versions of Polycyclic could lead to TwistedConjugacy providing incorrect results. It is also recommended to install the computer algebra system PARI/GP.

Installation

Either place the folder in the pkg subdirectory of your gap folder, or in any other folder where you have write permission. You can verify if GAP recognizes the TwistedConjugacy package using the following command:

gap> LoadPackage("TwistedConjugacy");
─────────────────────────────────────────────────────────────────────────────
Loading  TwistedConjugacy 2.2.0 (Computation with twisted conjugacy classes)
by Sam Tertooy (https://stertooy.github.io/).
Homepage: https://stertooy.github.io/TwistedConjugacy/
Report issues at https://github.com/stertooy/TwistedConjugacy/issues
─────────────────────────────────────────────────────────────────────────────
true

The manual may be compiled by running the ‘makedoc.g’ script, located in the package’s main directory. This requires the AutoDoc package. The manual is also available on the webpages of this package, at https://stertooy.github.io/TwistedConjugacy/doc/chap0_mj.html

Support

Please report any problems you may encounter using TwistedConjugacy at https://github.com/stertooy/TwistedConjugacy

License

The TwistedConjugacy package is licensed under the GNU General Public License v2.0 or later. A copy of this license is included.