Relationship between the rank and the matching number of a graph
Relationship between the rank and the matching number of a graph
复制标题
图的排名与匹配数之间的关系
DOI:
10.1016/j.amc.2019.02.055
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发表时间:
2019-08
影响因子:
4
通讯作者:
Luo Xiaobing
中科院分区:
文献类型:
--
作者:
Feng Zhimin;Huang Jing;Li Shuchao;Luo Xiaobing
Given a simple graph G, let A (G) be its adjacency matrix and α′(G) be its matching number. The rank of G, written as r (G), refers to the rank of A (G). In this paper, some relations between the rank and the matching number of a graph are studied. Firstly, it is proved that− 2 d (G)⩽ r (G)− 2 α′(G)⩽ N o, where d (G) and N o are, respectively, the dimension of cycle space and the number of odd cycles of G. Secondly, sharp lower bounds on both r (G)− α′(G) and r (G)/α′(G) are determined. All the corresponding extremal graphs are characterized, respectively.
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DOI:
10.1016/j.disc.2015.11.023
发表时间:
2016-05
期刊:
Discret. Math.
影响因子:
--
作者:
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通讯作者:
Long Wang
影响因子:
1.1
作者:
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DOI:
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发表时间:
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期刊:
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影响因子:
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作者:
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通讯作者:
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