For any integer r > 1, an r-trestle of a graph G is a 2-connected spanning subgraph F with maximum degree Δ(F) ≤ r. A graph G is called K1,r-free if G has no K1,r as an induced subgraph. Inspired by the work of Ryjáček and Tkáč, we show that every 2-connected K1,r-free graph has an r-trestle. The paper concludes with a corollary of this result for the existence of k-walks.
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Wuhan Text Univ, Res Ctr Nonlinear Sci, Sch Math & Phys Sci, Wuhan 430073, Peoples R ChinaGeorgia State Univ, Dept Math & Stat, Atlanta, GA 30303 USA
Chen, Yuan
Hu, Zhiquan
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Cent China Normal Univ, Sch Math & Stat, Hubei Key Lab Math Sci, Wuhan 430079, Peoples R ChinaGeorgia State Univ, Dept Math & Stat, Atlanta, GA 30303 USA
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Xinjiang Univ, Coll Math & Syst Sci, Urumqi 830046, Xinjiang, Peoples R ChinaXinjiang Univ, Coll Math & Syst Sci, Urumqi 830046, Xinjiang, Peoples R China
Xiong, Wei
Chen, Xing
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Xinjiang Inst Engn, Urumqi 830091, Xinjiang, Peoples R ChinaXinjiang Univ, Coll Math & Syst Sci, Urumqi 830046, Xinjiang, Peoples R China
Chen, Xing
Wu, Yang
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Macau Univ Sci & Technol, Sch Comp Sci & Engn, Macau, Macao, Peoples R ChinaXinjiang Univ, Coll Math & Syst Sci, Urumqi 830046, Xinjiang, Peoples R China
Wu, Yang
You, Zhifu
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Guangdong Polytech Normal Univ, Sch Math & Syst Sci, Guangzhou, Peoples R ChinaXinjiang Univ, Coll Math & Syst Sci, Urumqi 830046, Xinjiang, Peoples R China