Characterization of graphs with exactly two non-negative eigenvalues
DOI:
https://doi.org/10.26493/1855-3974.1077.5b6Keywords:
Spectrum and eigenvalues of graphs, graphs with exactly two non-negative eigenvaluesAbstract
In this paper we characterize all graphs with exactly two non-negative eigenvalues. As a consequence we obtain all graphs G such that λ3(G) < 0, where λ3(G) is the third largest eigenvalue of G.
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2016-12-23
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