Combinatorics Seminar 2017


Speaker: Peter Cameron, University of St Andrews

Date: Fri, Nov 17, 2017

Time: 14:55 - 15:50

Venue: Middle Meeting Room

Title: Permutation groups and transformation semigroups (IV)

Abstract:

In the final lecture of the series I will consider permutation groups with the property that the semigroup generated by the group together with any non-permutation of fixed rank has the property that the non-units form an idempotent-generated semigroup. In the rank 2 case, this leads to an interesting conjecture for primitive permutation groups called the road closure conjecture. Related topics will also be considered if time permits.

Slides: View slides


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