Degree conditions restricted to induced paths for hamiltonicity of claw-heavy graphs |
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Authors: | Bin Long Li Bo Ning Sheng Gui Zhang |
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Affiliation: | 1. Department of Applied Mathematics, Northwestern Polytechnical University, Xi'an 710072, P. R. China;2. European Centre of Excellence NTIS, 30614 Pilsen, Czech Republic;3. Center for Applied Mathematics, Tianjin University, Tianjin 300072, P. R. China;4. Department of Applied Mathematics, Northwestern Polytechnical University, Xi'an 710072, P. R. China |
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Abstract: | Broersma and Veldman proved that every 2-connected claw-free and P 6-free graph is hamiltonian. Chen et al. extended this result by proving every 2-connected claw-heavy and P 6-free graph is hamiltonian. On the other hand, Li et al. constructed a class of 2-connected graphs which are claw-heavy and P 6-o-heavy but not hamiltonian. In this paper, we further give some Ore-type degree conditions restricting to induced copies of P 6 of a 2-connected claw-heavy graph that can guarantee the graph to be hamiltonian. This improves some previous related results. |
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Keywords: | Hamiltonian graph forbidden subgraph condition degree condition claw-heavy graph closure theory |
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