Meike Hatzel, Constant congestion bramble

Zoom ID: 869 4632 6610 (ibsdimag)

In this talk I will present a small result we achieved during a workshop in February this year. My coauthors on this are Marcin Pilipczuk, Paweł Komosa and Manuel Sorge. A

Da Qi Chen, Bipartite Saturation

Zoom ID: 869 4632 6610 (ibsdimag)

In extremal graph theory, a graph G is H-saturated if G does not contain a copy of H but adding any missing edge to G creates a copy of H.

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Joonkyung Lee (이준경), On Ramsey multiplicity

Zoom ID:8628398170 (123450)

Ramsey's theorem states that, for a fixed graph $H$, every 2-edge-colouring of $K_n$ contains a monochromatic copy of $H$ whenever $n$ is large enough. Perhaps one of the most natural

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Joonkyung Lee (이준경), On common graphs

Zoom ID:8628398170 (123450)

A graph $H$ is common if the number of monochromatic copies of $H$ in a 2-edge-colouring of the complete graph $K_n$ is minimised by the random colouring. Burr and Rosta, extending

Karl Heuer, Even Circuits in Oriented Matroids

Zoom ID: 869 4632 6610 (ibsdimag)

In this talk I will state a generalisation of the even directed cycle problem, which asks whether a given digraph contains a directed cycle of even length, to orientations of

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