2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126836I describe a 27-vertex graph that is vertex-transitive and edge-transitive but not 1-transitive. Thus while all vertices and edges of this graph are similar, there are no edge-reversing automorphisms.Version dated 1985; GNU FDLCombinatoricsA 27-vertex graph that is vertex-transitive and edge-transitive but not l-transitivetext