Seminar

Partition Regular Equations

Graphs, Hypergraphs, and Computing

08 May 15:30 - 16:30

Imre Leader - University of Cambridge

A finite or infinite matrix M is called 'partition regular' if whenever the natural numbers are finitely coloured there exists a monochromatic vector x with Mx=0. Many of the classical results of Ramsey theory, such as van der Waerden's theorem or Schur's theorem, may be naturally rephrased as assertions that certain matrices are partition regular.

While the structure of finite partition regular matrices is well understood, little is known in the infinite case. In this talk we will review some known results and then proceed to some recent developments.

The talk will not assume any previous knowledge of the area.
Organizers
Magnus M. Halldorsson
Reykjavik University
Klas Markström
Umeå University
Andrzej Rucinski
Adam Mickiewicz University
Carsten Thomassen
Technical University of Denmark, DTU

Program
Contact

Klas Markström

klas.markstrom@math.umu.se

Other
information

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