On degree sum conditions for directed path-factors with a specified number of paths
On degree sum conditions for directed path-factors with a specified number of paths
复制标题
关于具有指定路径数的有向路径因子的度和条件
DOI:
10.1016/j.disc.2020.112114
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发表时间:
2020
影响因子:
0.8
通讯作者:
Pierre Montalbano
中科院分区:
文献类型:
--
作者:
Shuya Chiba;Eishi Mishio;Pierre Montalbano
A directed path-factor of a digraph is a spanning subdigraph consisting of a union of vertex-disjoint directed paths in the digraph. In this paper, we give the following result: If D is a digraph of order n≥(2 ℓ− 1) k− 1, and if d D+(u)+ d D−(v)≥ n− k for every two distinct vertices u and v with (u, v)∉ A (D), then D has a directed path-factor with exactly k directed paths of order at least ℓ (≥ 2). To show this theorem, we discuss the correspondence between digraphs and bipartite graphs with perfect matchings, and also consider degree conditions for the existence of long directed paths in digraphs.
影响因子:
0.8
作者:
M. Heydemann
通讯作者:
M. Heydemann
DOI:
10.1016/s0012-365x(99)90061-4
发表时间:
1999
期刊:
Discret. Math.
影响因子:
--
作者:
Guantao Chen;R. Gould;M. Jacobson
通讯作者:
M. Jacobson
DOI:
10.1007/bf02579454
发表时间:
1981
期刊:
Comb.
影响因子:
--
作者:
J. Bermond;A. Germa;M. Heydemann;D. Sotteau
通讯作者:
D. Sotteau