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math.GR2019
Elementary subgroups of virtually free groups
Simon André
We give a description of elementary subgroups (in the sense of first-order logic) of finitely generated virtually free groups. In particular, we recover the fact that elementary su…
math.GR2019★ 4 cited
On Tarski's problem for virtually free groups
Simon André
We give a complete classification of finitely generated virtually free groups up to -elementary equivalence. As a corollary, we give an algorithm that takes as inpu…