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: Tuesday, November 11, 2008, 12:15 pm

Duration: This information is not available in the database

Location: CAB G51

Speaker: Tom Rackham (Mathematical Institute, Oxford Univ.)

Methods of distance-constraint precolouring

Let G be a simple k-colourable graph and let P be a subset of V(G) of which all vertices are pairwise far apart. Under what circumstances does any k-colouring of P extend to a proper k- colouring of G? Given a family of k-colourable graphs, how much freedom is there in assigning a k-colouring? We present several methods for obtaining distance-constraint precolouring results in the context of using at most .(G) colours. We will discuss the question of the flexibility of list-colourings and improper- colourings of planar graphs.

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