On well quasi-order of graph classes under homomorphic image orderings
Date
06/2017Metadata
Show full item recordAbstract
In this paper we consider the question of well quasi-order for classes defined by a single obstruction within the classes of all graphs, digraphs and tournaments, under the homomorphic image ordering (in both its standard and strong forms). The homomorphic image ordering was introduced by the authors in a previous paper and corresponds to the existence of a surjective homomorphism between two structures. We obtain complete characterisations in all cases except for graphs under the strong ordering, where some open questions remain.
Citation
Huczynska , S & Ruškuc , N 2017 , ' On well quasi-order of graph classes under homomorphic image orderings ' , European Journal of Combinatorics , vol. 63 , pp. 164-175 . https://doi.org/10.1016/j.ejc.2017.03.008
Publication
European Journal of Combinatorics
Status
Peer reviewed
ISSN
0195-6698Type
Journal article
Collections
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.