Signed spectral Turań type theorems

M. Rajesh Kannan, Shivaramakrishna Pragada

A signed graph $\Sigma =(G,\sigma )$ is a graph where the function $\sigma$ assigns either $1$ or $-1$ to each edge of the simple graph $G$. The adjacency matrix of $\Sigma$, denoted by $A(\Sigma )$, is def…