Existence of non-Cayley Haar graphs

Yan-Quan Feng, István Kovács, Jie Wang +1

A Cayley graph of a group $H$ is a finite simple graph $\Gamma$ such that its automorphism group $\mathrm{Aut}(\Gamma )$ contains a subgroup isomorphic to $H$ acting regularly on $V(\Gamma )$, while a…