Abstract
An s-geodesic in a graph Γ is a path connecting two vertices at distance s. Being locally transitive on s-geodesics is not a monotone property: if an automorphism group G of a graph Γ is locally transitive on s-geodesics, it does not follow that G is locally transitive on shorter geodesics. In this paper, we characterise all graphs that are locally transitive on 2-geodesics, but not locally transitive on 1-geodesics.
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Dedicated to the memory of our colleague Ákos, who passed away too soon.
Alice, Cai Heng, and Wei
C. H. Li and Á . Seress were partially supported by DP1096525 of the Australian Research Council. Seress was also partially supported by the NSF. W. Jin was supported by a SIRF Scholarship at UWA and is now supported by the NNSF of China (11301230).
Ákos Seress is deceased (1958–2013).
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Devillers, A., Jin, W., Li, C.H. et al. Local 2-Geodesic Transitivity of Graphs. Ann. Comb. 18, 313–325 (2014). https://doi.org/10.1007/s00026-014-0224-y
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DOI: https://doi.org/10.1007/s00026-014-0224-y