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On tetravalent s-regular Cayley graphs

机译:在Tetravalent S-常规Cayley图上

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摘要

A Cayley graph G = Cay(G, S) is said to be core-free if G is core-free in some X for G <= X <= Aut Gamma. A graph G is called s-regular if AutG acts regularly on its s-arcs. It is shown in this paper that if s <= 2, then there exist no core-free tetravalent s-regular Cayley graphs; and for s >= 3, every tetravalent s-regular Cayley graph is a normal cover of one of the three known core-free graphs. In particular, a characterization of tetravalent s-regular Cayley graphs is given.
机译:如果G <= x <= aut伽马在某个x中,则据说Cayley图G = Cay(G,S)是无核的无核。 如果Autg定期在其S弧上运行,则称为S-Regular。 本文示出了,如果s <= 2,则存在无核心的四价S-常规Cayley图; 对于S> = 3,每个Tetravalent S常规Cayley图是三个已知的核心图中的一个正常盖子。 特别地,给出了四价S-常规卡利图的表征。

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