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No signed graph with the nullity $\eta(G,\sigma)=|V(G)|-2m(G)+2c(G)-1$. (arXiv:2006.00002v1 [math.CO]) http://arxiv.org/abs/2006.00002
No signed graph with the nullity $\eta(G,\sigma)=|V(G)|-2m(G)+2c(G)-1$. (arXiv:2006.00002v1 [math.CO]) http://arxiv.org/abs/2006.00002