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Iterated line graphs with only negative eigenvalues $-2$, their complements and energy. (arXiv:2205.02276v1 [math.CO]) http://arxiv.org/abs/2205.02276
Iterated line graphs with only negative eigenvalues $-2$, their complements and energy. (arXiv:2205.02276v1 [math.CO]) http://arxiv.org/abs/2205.02276