Generalized spectral characterization of signed bipartite graphs

Songlin Guo, Wei Wang, Lele Li

Let $\hat{I}\pounds$ be an $n$-vertex controllable or almost controllable signed bipartite graph, and let $\hat{I}{”}_{\hat{I}}\pounds$ denote the discriminant of its characteristic polynomial $\ddot{I}‡(\hat{I}\pounds ;x)$. We prove…