Avoidable paths in graphs - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2020

Avoidable paths in graphs

Résumé

We prove a recent conjecture of Beisegel et al. that for every positive integer k, every graph containing an induced P_k also contains an avoidable P_k. Avoidability generalises the notion of simpliciality best known in the context of chordal graphs. The conjecture was only established for k in {1,2} (Ohtsuki et al. 1976, and Beisegel et al. 2019, respectively). Our result also implies a result of Chv\'atal et al. 2002, which assumed cycle restrictions. We provide a constructive and elementary proof, relying on a single trick regarding the induction hypothesis. In the line of previous works, we discuss conditions for multiple avoidable paths to exist.
Fichier principal
Vignette du fichier
1908.03788.pdf (709.42 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02402905 , version 1 (17-01-2020)

Identifiants

Citer

Marthe Bonamy, Oscar Defrain, Meike Hatzel, Jocelyn Thiebaut. Avoidable paths in graphs. 2020. ⟨hal-02402905⟩
92 Consultations
54 Téléchargements

Altmetric

Partager

More