Bounds for the matching number and cyclomatic number of a signed graph in terms of rank
Bounds for the matching number and cyclomatic number of a signed graph in terms of rank
复制标题
有符号图的匹配数和圈数的界限
DOI:
10.1016/j.laa.2019.03.012
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发表时间:
2019-07
影响因子:
1.1
通讯作者:
Hong-Jian Lai
中科院分区:
文献类型:
--
作者:
Shengjie He;Rong-Xia Hao;Hong-Jian Lai
A signed graph (G, σ) is a graph with a sign attached to each of its edges, where G is the underlying graph of (G, σ). Let m (G), c (G) and r (G, σ) be the matching number, the cyclomatic number and the rank of the adjacency matrix of (G, σ), respectively. In this paper, we investigate the relation among the rank, the matching number and the cyclomatic number of a signed graph, and prove that 2 m (G)− 2 c (G))≤ r (G, σ)≤ 2 m (G)+ c (G). Furthermore, signed graphs reaching the lower bound or the upper bound are respectively characterized.
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影响因子:
1.1
作者:
Shujing Wang
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DOI:
10.2307/3616070
发表时间:
1973-12
期刊:
The Mathematical Gazette
影响因子:
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DOI:
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2010
期刊:
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DOI:
10.1155/2014/483735
发表时间:
2013-09
期刊:
J. Appl. Math.
影响因子:
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作者:
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1.1
作者:
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