Paul Rapoport

On the profinite distinguishability of hyperbolic Dehn fillings of finite-volume 3-manifolds

We use model theory to study relative profinite rigidity of $3$-manifold groups and show that given any residually finite group $\Gamma$ with finite character variety and single-cusped finite volume hyperbolic $3$-manifold $M$, cofinitely many Dehn fillings $M_{p/q}$ are profinitely distinguishable from $\Gamma$.