CIRCA seminar

The final CIRCA seminar of the semester will be on 13th April, at 1pm in Theatre C of Maths.

Ian Gent will speak on A Dream Model for Black Hole

Murray Whyte will speak on Irredundant monoid presentations

All welcome

Remaining CIRCA seminars this term

The final two CIRCA seminars of term will be

Thursday 17th November: Finn Smith and Jacob Beaddie

Thursday 24th November: Michael Young and Peter Cameron. Note the unusual date for this one, and also that it will be in Purdie C rather than Maths.

CIRCA lunchtime seminars 2022

The seminars for Autumn 2022 will be held on Thursdays of even weeks at 1pm in Theatre B of Maths. The schedule at present is:

September 22nd: Colva Roney-Dougal and Chris Jefferson

October 6th: Ruth Hoffman and Alan Logan

October 20th: Saul Freedman and Ozgur Akgun

November 3rd: Jendrik Brachter (TU Darmstadt)

November 17th: TBA

December 1st: Michael Young and Peter Cameron

British Combinatorial Conference 2019

From 29th July-2nd August Rosemary Bailey, Peter Cameron, and Siavash Lashkarighouchani attended the British Combinatorial Conference at the University of Birmingham. Peter organised a mini-symposium on Designs and Latin Squares, at which Rosemary spoke on ‘Substitutes for the non-existent square lattice design for 36 treatments’. Peter also contributed a talk on ‘Hall-Paige and synchronization’. At the conference business meeting, Peter was re-elected chair of the British Combinatorial Committee, a position he has held for 25 years.

LMS Undergraduate Summer School

Peter Cameron spent the week 22nd-26th July at the London Mathematical Society’s Undergraduate Summer School at the University of Leeds, where he gave two talks, one on ‘Problems around graphs, groups and semigroups’ and one on ‘The random graph’.

Research Day in the School of Mathematics and Statistics

CIRCA members took part in the Research Day, held in the School of Mathematics and Statistics on 24th January 2019. The speakers were Rosemary Bailey, Collin Bleak, Peter Cameron, Martyn Quick, Louis Theran, and Peter Cameron. Olexandr Konovalov and Michael Torpey presented a poster.

Algebra and Combinatorics Seminars

The schedule of Algebra and Combinatorics Seminars for February-May 2018 can be found here. They will run on Wednesdays at 1pm in Lecture Theatre D.

Teaching good research software practices

Olexandr Konovalov and Michael Torpey recently taught at two Software Carpentry workshops. The first one was a workshop for University of St Andrews researchers supported by CAPOD, and the second one was for the the EPSRC Centre for Doctoral Training in Critical Resource Catalysis (CRITICAT)

CIRCA Lunchtime Seminar (15.02.2018)

The next CIRCA Lunchtime Seminar will be on Thursday 15th February in Maths Lecture Theatre C at 1pm. Ian Gent and Markus Pfeiffer will be speaking.

Reed–Muller codes and Thomas’ conjecture

There will be a seminar on  Wednesday February 7th, 2018 at 1pm in Lecture Theatre D: Peter Cameron will speak on Reed–Muller codes and Thomas’ conjecture.

Abstract: A countable first-order structure is countably categorical if its automorphism group has only finitely many orbits on n-tuples of points of the structure for all n. (Homogeneous structures over finite relational languages provide examples.) For countably categorical structures, we can regard a reduct of the structure as a closed overgroup of its automorphism group. Simon Thomas showed that the famous countable random graph has just five reducts, and conjectured that any countable homogeneous structure has only finitely many reducts. Many special cases have been worked out but there is no sign of a general proof yet. In order to test the limits of the conjecture, Bertalan Bodor, Csaba Szabo and I showed that a vector space over GF(2) of countable dimension with a distinguished non-zero vector has infinitely many reducts. The proof can most easily be seen using an infinite generalisation of the binary Reed–Muller codes.