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Resumen de The Cayley graphs of Zd and the limits of vertex-primitive graphs of HA -type

K.V. Kostousov

  • We study the limits of the finite graphs that admit some vertex-primitive group of automorphisms with a regular abelian normal subgroup. It was shown in [1] that these limits are Cayley graphs of the groups Zd. In this article we prove that for each d > 1 the set of Cayley graphs of Zd presenting the limits of finite graphs with vertex-primitive and edge-transitive groups of automorphisms is countable (in fact, we explicitly give countable subsets of these limit graphs). In addition, for d < 4 we list all Cayley graphs of Zd that are limits of minimal vertex-primitive graphs. The proofs rely on a connection of the automorphism groups of Cayley graphs of Zd with crystallographic groups.


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