GAP Days Spring 2019

18th to 22nd March 2019
Martin Luther University of Halle-Wittenberg

GAP Days in general

GAP Days are meetings where developers and users with GAP programming experience are invited to discuss, influence, and contribute to the future development of GAP. To streamline each meeting, the organisers usually suggest a few main topics to work on during the week.

The meetings are also suitable for advertising recent developments in GAP itself, and its packages, via short talks. However, the focus of the meetings is on development, with talks playing only a minor role. As enough GAP experts will be around for advice and technical support, the meetings offer particularly good opportunities for people to work on their own packages. At the end of the week, we would be happy to hear about any progress you made.

Please visit for a list of all GAP Days.

GAP Days Spring 2019

The theme of this GAP Days will be “Modern Permutation Group Algorithms”. During this GAP Days, we aim to survey, understand, and develop the algorithmic infrastructure for permutation groups in GAP. To support these aims, we will begin by spending the first day reviewing and discussing the current functionality in GAP for permutations and permutation groups, beginning with the way permutations are stored and the basic orbit-stabiliser algorithms, and identifying areas in the code and documentation for improvement as we proceed.

We will also include a small number of talks during the GAP Days about computing with permutation groups in GAP. If there is a particular topic in this area that you would like to hear a talk about, then please include details in the comment box at registration, or email us later.

We would like this GAP Days to be an opportunity for all interested people with little knowledge of the insides of GAP to join in: this includes undergraduate students, PhD students, post-docs, and more experienced mathematicians. You will be able to meet us and each other, and learn about GAP development and algorithmic group theory in a relaxed and friendly atmosphere.

GAP Days Spring 2019 is organised by

More detailed information can be found on the program page.

Registering and visiting

GAP Days Spring 2019 will take place at the Martin Luther University of Halle-Wittenberg. Information about the exact location can be found on the location page.


If you have questions or suggestions, then please contact the organisers by email at