Disjoint directed cycles with specified lengths in directed bipartite graphs
Disjoint directed cycles with specified lengths in directed bipartite graphs
复制标题
有向二部图中具有指定长度的不相交有向循环
DOI:
10.1016/j.disc.2020.112276
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发表时间:
2021-04
影响因子:
0.8
通讯作者:
Qingsong Zou
中科院分区:
文献类型:
--
作者:
Yunshu Gao;Hong Wang;Qingsong Zou
Abstract Let D=(V 1, V 2; A) be a directed bipartite graph with| V 1|=| V 2|= n≥ 2. Let a (v) denote the degree of v in D for all v∈ V (D). Suppose that a (x)+ a (y)≥ 3 n for all x∈ V 1 and y∈ V 2. Then for any k positive integers n 1,…, n k with n 1+⋯+ n k≤ n, D contains k disjoint directed cycles of lengths 2 n 1, 2 n 2,…, 2 n k, respectively, unless n is even and D is isomorphic to an exceptional directed bipartite graph. This confirms a conjecture posed by Hong Wang in 2001.
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影响因子:
0.7
作者:
Hong Wang
通讯作者:
Hong Wang
DOI:
10.1007/bf01901931
发表时间:
1963-03
期刊:
Acta Mathematica Academiae Scientiarum Hungarica
影响因子:
--
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通讯作者:
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DOI:
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发表时间:
1984
期刊:
Discret. Math.
影响因子:
--
作者:
M. El-Zahar
通讯作者:
M. El-Zahar
DOI:
10.1057/jors.1977.45
发表时间:
1978-03
期刊:
--
影响因子:
--
作者:
E. Lloyd;J. Bondy;U. Murty
通讯作者:
E. Lloyd;J. Bondy;U. Murty
DOI:
10.1016/0012-365x(93)90345-t
发表时间:
1993-07
期刊:
Discret. Math.
影响因子:
--
作者:
Hong Wang
通讯作者:
Hong Wang