文章基本信息

标题：On the spectrum and energy of singular graphs
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作者：T.K. Mathew Varkey ; John K. Rajan
期刊名称：AKCE International Journal of Graphs and Combinatorics
印刷版ISSN：0972-8600
出版年度：2019
卷号：16
期号：3
页码：265-271
DOI：10.1016/j.akcej.2018.06.002
语种：English
出版社：Elsevier
摘要：AbstractEnergy of a graph is defined as the sum of the absolute values of the eigenvalues of the adjacency matrixA(G)of a graphGand is denoted byE(G). The graphGwithnvertices is called nonhypoenergetic ifE(G)≥nand hypoenergetic ifE(G)0. In this paper we study about nonhypoenergetic and hypoenergetic graphs among singular graphs. We also construct singular graphs of larger nullity using coalescence.
关键词：KeywordsSingular graphsCoalescenceCore verticesEnergy of graphNonhypoenergetic graph