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Category Archives: events
G2D2, 5: The logo revisited
There has been further discussion of the G2 logo; here is a brief summary. Elena Konstantinova tells me that it was designed by Vava Stefoglo; her portfolio is here. She is not a mathematician but received a good education in … Continue reading
G2D2, 4: the second week
The lecturers of the first two minicourses now gave way for the second team. Mike Boyle and Scott Schmieding told us about symbolic dynamics, in particular, subshifts and their automorphism groups. This was particularly valuable to me: I had dove … Continue reading
G2D2, 2: first week
The campus of the China Three Gorges Hotel has a small river, full of waterlilies and lotus flowers. Beside it runs a main road, along which big water trucks run, shooting atomised water from cannon-like structures; we are told this … Continue reading
BCC at Birmingham, days 4 and 5
Thursday saw my favourite of the plenary talks. Iain Moffatt told us about ribbon graphs and delta-matroids. Ribbon graphs are essentially the same as graphs drawn on surfaces (we just fatten up each vertex to a disc and each edge … Continue reading
Posted in events
Tagged delta-matroids, large sets of designs, Neumaier graphs, ribbon graphs, rumples, Turan theory
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BCC at Birmingham, days 1-3
This week I am in Birmingham for the British Combinatorial Conference. The organisation of the conference is outstanding. For one small example, yesterday, fifteen minutes before the Business Meeting was due to start, the Chairman noticed that we didn’t have … Continue reading
Posted in events
Tagged ADE diagrams, Henson graphs, independence polynomial, Ramsey theory, random permutations, skew Young tableaux
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Aliens Do Exist
The people from the planet Ade have intercepted radio transmissions from Earth, and have discovered that we know about the Petersen graph and the root system E6. One day, a flying saucer from Ade arrives on Earth and delivers an … Continue reading
Posted in doing mathematics, events
Tagged Petersen graph, random graph, root systems, Sira Gratz, University of Leeds
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London Combinatorics Colloquia 2019
In London last week for the two combinatorics colloquia, at Queen Mary and LSE. The weather was unusually grey and rainy; it seems in retrospect that it is almost always fine and sunny for this event, but I know that … Continue reading
Posted in events, exposition
Tagged 1-factorisations, Hadamard matrices, model theory, Ramsey theory, Regularity Lemma, Schur's theorem, stability, topology
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