A graph G is N 2 -locally connected if for every vertex v in G, the edges not incident with v but having at least one end adjacent to v in G induce a connected graph. In 1990, Ryja ´c ˇek conjectured that every 3-connected N 2 -locally connected claw-free graph is Hamiltonian. This conjecture is pro
On hamiltonian claw-free graphs
✍ Scribed by E. Flandrin; J.L. Fouquet; H. Li
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 515 KB
- Volume
- 111
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
✦ Synopsis
We show that every 3-connected claw-free graphs having at most 5S-10 vertices is hamiltonian, where 6 is the minimum degree. For regular 3-connected claw-free graphs, a related result was obtained by Li and Liu (preprint), but for nonregular claw-free graphs the best-known result comes from the work of Zhang ( 1988), with n <46 + 3.
bound can be strengthened to 56 -5 (see [4]). Our purpose is to show that the above regularity condition can be dropped. More precisely, we get the following theorem.
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