Degrees and cycles in digraphs
Degrees and cycles in digraphs
复制标题
有向图中的度数和周期
DOI:
10.1016/0012-365x(82)90020-6
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发表时间:
1982
影响因子:
0.8
通讯作者:
M. Heydemann
中科院分区:
文献类型:
--
作者:
M. Heydemann
In this article, we give conditions on the total degrees of the vertices in a strong digraph implying the existence of a cycle of length at least⌈(n− 1) h⌉+ 1, where n is the number of vertices of the graph and h an integer, 1⩽ h⩽ n− 1. The same conditions imply the existence of a path of length⌈(n− 1) h⌉+⌈(n− 2) h⌉. In the case of strong oriented graphs (antisymmetric digraphs) we improve these conditions. In both cases, we show that the given conditions are the best possible.