On P_4-tidy graphs - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Discrete Mathematics and Theoretical Computer Science Année : 1997

On P_4-tidy graphs

Résumé

We study the P_4-tidy graphs, a new class defined by Rusu [30] in order to illustrate the notion of P_4-domination in perfect graphs. This class strictly contains the P_4-extendible graphs and the P_4-lite graphs defined by Jamison & Olariu in [19] and [23] and we show that the P_4-tidy graphs and P_4-lite graphs are closely related. Note that the class of P_4-lite graphs is a class of brittle graphs strictly containing the P_4-sparse graphs defined by Hoang in [14]. McConnel & Spinrad [2] and independently Cournier & Habib [5] have shown that the modular decomposition tree of any graph is computable in linear time. For recognizing in linear time P_4-tidy graphs, we apply a method introduced by Giakoumakis in [9] and Giakoumakis & Fouquet in [6] using modular decomposition of graphs and we propose linear algorithms for optimization problems on such graphs, as clique number, stability number, chromatic number and scattering number. We show that the Hamiltonian Path Problem is linear for this class of graphs. Our study unifies and generalizes previous results of Jamison & Olariu ([18], [21], [22]), Hochstattler & Schindler[16], Jung [25] and Hochstattler & Tinhofer [15].
Fichier principal
Vignette du fichier
dm010102.pdf (146.6 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00955688 , version 1 (05-03-2014)

Identifiants

Citer

V. Giakoumakis, F. Roussel, H. Thuillier. On P_4-tidy graphs. Discrete Mathematics and Theoretical Computer Science, 1997, Vol. 1, pp.17-41. ⟨10.46298/dmtcs.232⟩. ⟨hal-00955688⟩
112 Consultations
931 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More