摘要
Hua et al. (Discrete Math 311, 2259-2267, 2011) and Yang et al. (Discrete Math. 339, 522-532, 2016) classify arc-transitive pentavalent graphs of order 2pq and of order 2pqr (with p, q, r distinct odd primes), respectively. In this paper, we extend their results by giving a classification of arc-transitive pentavalent graphs of any square-free order.