Groupoids, graphs of groups, and graphs of groupoids

Version 1.46

This project is maintained by Christopher D. Wensley

GAP Package gpd

The Gpd package provides a collection of functions for computing with finite groupoids, graph of groups, and graphs of groupoids. These are based on the more basic structures of magmas with objects and their mappings. It provides functions for normal forms of elements in Free Products with Amalgamation and in HNN extensions.

The current version of this package is version 1.46. For more information, please refer to the package manual. There is also a README file.


This package requires GAP version >=4.8

The following other GAP packages are needed:

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


Emma J. Moore, Christopher D. Wensley


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