Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10225757 | Theoretical Computer Science | 2018 | 24 Pages |
Abstract
We study the following problem: for given integers d, k and graph G, can we reduce some fixed graph parameter Ï of G by at least d via at most k graph operations from some fixed set S? As parameters we take the chromatic number Ï, clique number Ï and independence number α, and as operations we choose edge contraction ec and vertex deletion vd. We determine the complexity of this problem for S={ec} and S={vd} and Ïâ{Ï,Ï,α} for a number of subclasses of perfect graphs. We use these results to determine the complexity of the problem for S={ec} and S={vd} and Ïâ{Ï,Ï,α} restricted to H-free graphs.
Related Topics
Physical Sciences and Engineering
Computer Science
Computational Theory and Mathematics
Authors
Ãznur YaÅar Diner, Daniël Paulusma, Christophe Picouleau, Bernard Ries,