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Monthly Archives: August 2017

GAP 4.8.8 release

GAP 4.8.8 release, which also includes 30 package updates, has been announced today and is now available for download from the GAP website. Please also see the release announcement in the GAP Forum.

 

Leonard Soicher’s visit to Portugal

The CoDiMa project supported my participation in “All Kinds of Mathematics Remind me of You: Conference to celebrate the 70th Anniversary of┬áPeter J. Cameron“, held at the University of Lisbon, 24-27 July 2017.┬áThis conference brought together many colleagues, students and collaborators of Peter Cameron, and a diverse range of interesting mathematical research (covering Peter’s diverse range of interests) was presented and discussed.

This conference gave me the opportunity to present and discuss my recent algorithms and programs (in GAP/GRAPE) to exploit graph symmetry in graph colouring, in particular in the difficult problem of computing the chromatic number of a graph. I was also able to discuss the application of these programs to the determination of the “non-synchronizing” primitive permutation groups (of interest to researchers in semigroup and automata theory) of degree at most 255.

Leonard Soicher