The nullity of a graph is defined to be the multiplicity of the eigen-value zero in the spectrum of the adjacency matrix of the graph. In this paper, we obtain the nullity set of bipartite graphs of order n, and characterize the bipartite graphs with nullity n - 4 and the regular bipartite graphs with nullity n - 6. (C) 2009 Elsevier Inc. All rights reserved.
机构:
Guangdong Univ Foreign Studies, Dept Math & Stat, Sch Informat, Guangzhou, Guangdong, Peoples R ChinaS China Normal Univ, Dept Math, Guangzhou, Guangdong, Peoples R China
Cheng, Bo
Liu, Bolian
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S China Normal Univ, Dept Math, Guangzhou, Guangdong, Peoples R ChinaS China Normal Univ, Dept Math, Guangzhou, Guangdong, Peoples R China
机构:
Qinghai Nationalities Coll, Dept Math, Xining 810007, Qinghai, Peoples R ChinaS China Normal Univ, Dept Math, Guangzhou 510631, Guangdong, Peoples R China
Hu, Shengbiao
Tan Xuezhong
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Guangdong Univ Business Studies, Dept Math, Guangzhou 510320, Guangdong, Peoples R ChinaS China Normal Univ, Dept Math, Guangzhou 510631, Guangdong, Peoples R China
Tan Xuezhong
Liu, Bolian
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S China Normal Univ, Dept Math, Guangzhou 510631, Guangdong, Peoples R ChinaS China Normal Univ, Dept Math, Guangzhou 510631, Guangdong, Peoples R China