Polynomially determine if a graph is (s, 3)-supereulerian
Polynomially determine if a graph is (s, 3)-supereulerian
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多项式确定图是否是 (s, 3)-超欧拉图
DOI:
10.1016/j.disc.2021.112601
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发表时间:
2021-12
影响因子:
0.8
通讯作者:
Hong-Jian Lai
中科院分区:
文献类型:
--
作者:
Wei Xiong;Sulin Song;Hong-Jian Lai
For integers s≥ 0 and t≥ 0, a graph G is (s, t)-supereulerian if for any disjoint edge sets X, Y⊆ E (G) with| X|≤ s and| Y|≤ t, G has a spanning closed trail that contains X and avoids Y. Pulleyblank in 1979 showed that determining whether a graph is (0, 0)-supereulerian, even when restricted to planar graphs, is NP-complete. We investigate the value of the smallest integer j (s, t) such that every j (s, t)-edge-connected graph is (s, t)-supereulerian, and show that j (s, t)={max{4, t+ 2} if 0≤ s≤ 1, or (s, t)∈{(2, 0),(2, 1),(3, 0)}, 5 if (s, t)∈{(2, 2),(3, 1)}, s+ t+ 1−(− 1) s 2 if s≥ 2 and s+ t≥ 5. As applications, we obtain a characterization of (s, t)-supereulerian graphs when t≥ 3 in terms of edge-connectivities, and show that when t≥ 3, there exists a polynomial time algorithm to determine if a graph is (s, t)-supereulerian.
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影响因子:
1.1
作者:
Ran Gu;Hong-Jian Lai;Yanting Liang;Zhengke Miao;Meng Zhang
通讯作者:
Meng Zhang
DOI:
10.1016/j.dam.2013.08.041
发表时间:
2014
期刊:
Discret. Appl. Math.
影响因子:
--
作者:
Jinquan Xu;Zhi-Hong Chen;H. Lai;Meng Zhang
通讯作者:
Jinquan Xu;Zhi-Hong Chen;H. Lai;Meng Zhang
DOI:
--
发表时间:
2013
期刊:
--
影响因子:
--
作者:
H. Lai;Yehong Shao
通讯作者:
H. Lai;Yehong Shao
DOI:
10.1016/s0012-365x(00)00070-4
发表时间:
2001-03
期刊:
Discret. Math.
影响因子:
--
作者:
H. Lai
通讯作者:
H. Lai
DOI:
10.1002/jgt.3190010115
发表时间:
1977-03
期刊:
J. Graph Theory
影响因子:
--
作者:
F. Boesch;C. Suffel;R. Tindell
通讯作者:
F. Boesch;C. Suffel;R. Tindell