2-Factors in claw-free graphs with locally disconnected vertices
2-Factors in claw-free graphs with locally disconnected vertices
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具有局部断开顶点的无爪图中的 2 因子
DOI:
10.1007/s10587-015-0177-2
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发表时间:
2015-06
影响因子:
0.5
通讯作者:
Tian Runli
中科院分区:
文献类型:
--
作者:
An Mingqiang;Xiong Liming;Tian Runli
An edge ofGis singular if it does not lie on any triangle ofG; otherwise, it is non-singular. A vertexuof a graphGis called locally connected if the induced subgraphG[N(u)] by its neighborhood is connected; otherwise, it is called locally disconnected.In this paper, we prove that if a connected claw-free graphGof order at least three satisfies the following two conditions: (i) for each locally disconnected vertexvof degree at least 3 inG, there is a nonnegative integerssuch thatvlies on an induced cycle of length at least 4 with at mostsnon-singular edges and with at leasts-5 locally connected vertices; (ii) for each locally disconnected vertexvof degree 2 inG, there is a nonnegative integerssuch thatvlies on an induced cycleCwith at mostsnon-singular edges and with at leasts-3 locally connected vertices and such thatG[V(C)∩V2(G)] is a path or a cycle, thenGhas a 2-factor, and it is the best possible in some sense. This result generalizes two known results in Faudree, Faudree and Ryjáček (2008) and in Ryjáček, Xiong and Yoshimoto (2010).
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DOI:
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发表时间:
2007-10
期刊:
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影响因子:
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DOI:
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发表时间:
2000-02
期刊:
Discret. Math.
影响因子:
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通讯作者:
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