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  • Normal and non-normal Cayle...
    Xu, Yian

    Discrete mathematics, June 2022, 2022-06-00, Volume: 345, Issue: 6
    Journal Article

    A Cayley graph is said to be an NNN-graph if its automorphism group contains two isomorphic regular subgroups where one is normal and the other is non-normal. In this paper, we show that there exist NNN-graphs among the Cayley graphs for symmetric groups Sn if and only if n⩾5.