Isospectral Cayley graphs with even and odd spectrum

Paula M. Chiapparoli, Ricardo A. Podestá

For a group $G$ and subsets $S,T\subset G$ we introduce the mirror di-Cayley graph $MX(G;S,T)$ and mirror di-Cayley sum graph $M{X}^{+}(G;S,T)$ with connections sets $S$ and $T$ (MDCG…