István Estélyi: Cayley Integral Graphs

Povzetek. A finite group G is called a Cayley integral group if every undirected Cayley graph over G has an integral spectrum. Finite abelian Cayley integral groups have been determined by W. Klotz and T. Sander [Electronic J. Combin. 17 (2010), # R81.] In this talk we determine the finite non-abelian Cayley integral groups.