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The lamplighter group of rank two generated by a bireversible automaton
Published 11 Feb 2018 in math.GR | (1802.03695v1)
Abstract: We construct a 4-state 2-letter bireversible automaton generating the lamplighter group $(\mathbb Z_22)\wr\mathbb Z$ of rank two. The action of the generators on the boundary of the tree can be induced by the affine transformations on the ring $\mathbb Z_2[[t]]$ of formal power series over $\mathbb Z_2$.
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