On Groups all of whose Undirected Cayley Graphs of Bounded Valency are Integral
On Groups all of whose Undirected Cayley Graphs of Bounded Valency are Integral
A finite group $G$ is called Cayley integral if all undirected Cayley graphs over $G$ are integral, i.e., all eigenvalues of the graphs are integers. The Cayley integral groups have been determined by Kloster and Sander in the abelian case, and by Abdollahi and Jazaeri, and independently by Ahmady, Bell …