Weighted parameters in (P5, P5)-free graphs
β Scribed by Vassilis Giakoumakis; Irena Rusu
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 488 KB
- Volume
- 80
- Category
- Article
- ISSN
- 0166-218X
No coin nor oath required. For personal study only.
β¦ Synopsis
We use the modular decomposition to give O(n(m + n)) algorithms for finding a maximum weighted clique (respectively stable set) and an approximate weighted colouring (respectively partition into cliques) in a (&,E)-free graph. As a by-product, we obtain an O(m+n) algorithm for finding a minimum weighted transversal of the CS in a (Ps,&)-free graph.
π SIMILAR VOLUMES
Fouquet, J.L., A decomposition for a class of (P,, P,)-free graphs, Discrete Mathematics 121 (1993) 75-83. We give a decomposition for a subclass of (P5, P, )-free graphs, leading to an 0(n3) algorithm for the recognition of this class of graphs.
Using the concept of prime graphs and modular decomposition of graphs, we give a complete structure description of (P5,diamond)-free graphs implying that these graphs have bounded clique width (the P5 is the induced path with ΓΏve vertices a; b; c; d; e and four edges ab; bc; cd; de, and the diamond
The complexity status of the maximum stable set problem in the class of P5-free graphs is unknown. In this paper, we ΓΏrst propose a characterization of all connected P5-free augmenting graphs. We then use this characterization to detect families of subclasses of P5-free graphs where the maximum stab