Title
A Polychromatic Ramsey Theory for Ordinals.
Abstract
The Ramsey degree of an ordinal a is the least number n such that any colouring of the edges of the complete graph on a using finitely many colours contains an n-chromatic clique of order type a. The Ramsey degree exists for any ordinal alpha < omega(omega) We provide an explicit expression for computing the Ramsey degree given a. We further establish a version of this result for automatic structures. In this version the ordinal and the colouring are presentable by finite automata and the clique is additionally required to be regular. The corresponding automatic Ramsey degree turns out to be greater than the set theoretic Ramsey degree. Finally, we demonstrate that a version for computable structures fails.
Year
DOI
Venue
2013
10.1007/978-3-642-40313-2_50
Lecture Notes in Computer Science
Field
DocType
Volume
Ramsey theory,Complete graph,Discrete mathematics,Combinatorics,Clique,Ordinal number,Computer science,Finite-state machine,Order type,Regular language
Conference
8087
ISSN
Citations 
PageRank 
0302-9743
0
0.34
References 
Authors
8
2
Name
Order
Citations
PageRank
Martin Huschenbett1103.11
Jiamou Liu24923.19