The graphs of pyramids are determined by their spectrum

Noam Krupnik, Abraham Berman

For natural numbers $k<n$ we study the graphs $T_{n,k}:=K_k\vee \overline{K_{n-k}}$. For $k=1$, $T_{n,1}$ is the star $S_{n-1}$. For $k>1$ we refer to $T_{n,k}$ as a \emph{graph o…