Vertex-transitive graphs with local action the symmetric group on ordered pairs
Journal of Group Theory(2020)
Abstract
We consider a finite, connected and simple graph $\Gamma$ that admits a vertex-transitive group of automorphisms $G$. Under the assumption that, for all $x \in V(\Gamma)$, the local action $G_x^{\Gamma(x)}$ is the action of $\mathrm{Sym}(n)$ on ordered pairs, we show that the group $G_x^{[3]}$, the pointwise stabiliser of a ball of radius three around $x$, is trivial.
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Key words
symmetric group,local action,graphs,vertex-transitive
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