Author

Henry Jaspars

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Preprint Aug 2026

On context-free subgroups and R. Thompson's group $V$

Consider $V_*$, the subgroup of R. Thompson's group $V$ which stabilises $0^\omega$ under the natural action upon the Cantor set, $\{0, 1\}^\omega$. Let $G_*$ be any subgroup of a finitely generated group $G$. We show that $G_*$ is a context-free subgroup of $G$ if and only if $G_*$ is a pullback of $V_*$ under a homom...

Henry Jaspars · 1 citation