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  • Line graphs and geodesic transitivity
    Devillers, Alice ...
    For a graph ▫$\Gamma$▫, a positive integer ▫$s$▫ and a subgroup ▫$G \le \text{Aut}(\Gamma)$▫, we prove that ▫$G$▫ is transitive on the set of ▫$s$▫-arcs of ▫$\Gamma$▫ if and only if ▫$\Gamma$▫ has ... girth at least ▫$2(s - 1)$▫ and ▫$G$▫ is transitive on the set of ▫$(s - 1)$▫-geodesics of its line graph. As applications, we first classify 2-geodesic transitive graphs of valency 4 and girth 3, and determine which of them are geodesic transitive. Secondly we prove that the only non-complete locally cyclic 2-geodesic transitive graphs are the octahedron and the icosahedron.
    Source: Ars mathematica contemporanea : special issue Bled'11 (Vol. 6, no. 1, 2013, str. 13-30)
    Type of material - conference contribution ; adult, serious
    Publish date - 2013
    Language - english
    COBISS.SI-ID - 16467289