Infinitely many nonsolvable groups whose Cayley graphs are hamiltonian

Abstract

This note shows there are infinitely many finite groups G, such that every connected Cayley graph on G has a hamiltonian cycle, and G is not solvable. Specifically, for every prime p that is congruent to 1, modulo 30, we show there is a hamiltonian cycle in every connected Cayley graph on the direct product of the cyclic group of order p with the alternating group A_5 on five letters.Comment: 7 pages, plus a 22-page appendix of notes to aid the refere