RAIRO-Theor. Inf. Appl.
Volume 39, Number 1, January-March 2005Imre Simon, the tropical computer scientist
|Page(s)||133 - 144|
|Published online||15 March 2005|
Finding H-partitions efficiently
Instituto de Computação,
Universidade Estadual de Campinas, Caixa Postal 6176, CEP
13084-971, Campinas, SP, Brasil; firstname.lastname@example.org
2 Instituto de Matemática and COPPE, Universidade Federal do Rio de Janeiro, Caixa Postal 68530, CEP 21945-970, Rio de Janeiro, RJ, Brasil; email@example.com & firstname.lastname@example.org
3 CNRS, GeoD research group, “Maths à modeler” project, Laboratoire Leibniz, France; email@example.com
We study the concept of an H-partition of the vertex set of a graph G, which includes all vertex partitioning problems into four parts which we require to be nonempty with only external constraints according to the structure of a model graph H, with the exception of two cases, one that has already been classified as polynomial, and the other one remains unclassified. In the context of more general vertex-partition problems, the problems addressed in this paper have these properties: non-list, 4-part, external constraints only (no internal constraints), each part non-empty. We describe tools that yield for each problem considered in this paper a simple and low complexity polynomial-time algorithm.
Mathematics Subject Classification: 05C85 / 68R10
Key words: Structural graph theory / computational difficulty of problems / analysis of algorithms and problem complexity / perfect graphs / skew partition
© EDP Sciences, 2005
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