Department of Computer Science | Institute of Theoretical Computer Science | CADMO

Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Monday, July 16, 2012, 12:15 pm

Duration: 30 minutes

Location: CAB G51

Speaker: Jan Foniok (Queen's University)

Ramsey Classes Defined by Forbidden Homomorphisms

I will talk about Ramsey properties of classes of digraphs (or more generally, relational structures) defined by forbidding homomorphisms from a fixed set of digraphs. Cases with infinitely many forbidden structures are of particular interest, especially if the forbidden “obstructions” are all trees or have bounded treewidth. These classes have several interesting applications, in areas such as complexity theory of constraint satisfaction problems.

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