Signed (0,2)‐graphs with few eigenvalues and a symmetric spectrum

We investigate properties of signed graphs that have few distinct eigenvalues together with a symmetric spectrum. Our main contribution is to determine all signed rectagraphs (triangle‐free signed ( 0 , 2 ) $(0,2)$‐graphs) with vertex degree at most 6 that have precisely two distinct eigenvalues ± λ...

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Veröffentlicht in:	Journal of combinatorial designs 2022-05, Vol.30 (5), p.332-353
Hauptverfasser:	Greaves, Gary R. W., Stanić, Zoran
Format:	Artikel
Sprache:	eng
Schlagworte:	(folded) cube adjacency matrix bipartite double Eigenvalues Graph theory Graphs rectagraph signed (0,2)‐graph symmetric spectrum weighing matrix
Online-Zugang:	Volltext
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