Please use this identifier to cite or link to this item: https://research.matf.bg.ac.rs/handle/123456789/1384
Title: A complete characterization of graphs with exactly two positive eigenvalues
Authors: Duan, Fang
Huang, Qiongxiang X.
Huang, Xueyi Y.
Stanić, Zoran 
Wang, Jianfeng F.
Affiliations: Numerical Mathematics and Optimization 
Keywords: Congruent vertex;Forbidden subgraph;Nullity;Positive (negative) inertia index
Issue Date: 1-Mar-2023
Rank: M22
Publisher: Elsevier
Journal: Advances in Applied Mathematics
Abstract: 
In 1977, Smith has characterized graphs with exactly one positive eigenvalue. Since then, many particular results related to graphs with exactly two positive eigenvalues have emerged. In this paper we conclude this investigation by giving a full characterization of these graphs.
URI: https://research.matf.bg.ac.rs/handle/123456789/1384
ISSN: 01968858
DOI: 10.1016/j.aam.2022.102457
Appears in Collections:Research outputs

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