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arXiv · 1909.06821

Some non-sign-symmetric signed graphs with symmetric spectrum

Farzaneh Ramezani
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Abstract

We construct infinitely many signed graphs having symmetric spectrum, by using the NEPS and rooted product of signed graphs. We also present a method for constructing large cospectral signed graphs. Although the obtained family contains only a minority of signed graphs, it strengthen the belief that the signed graphs with symmetric spectrum are deeper than bipartite graphs, i.e the unsigned graphs with symmetric spectrum.

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Farzaneh Ramezani. 2019-09-15. Some non-sign-symmetric signed graphs with symmetric spectrum. https://arxiv.org/abs/1909.06821

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