Profinite rigidity and hyperbolic four-punctured sphere bundles over the circle

Tamunonye Cheetham-West

Published 2023-08-01Version 1

We show that hyperbolic four-punctured $S^2-$bundles over $S^1$ are distinguished by the finite quotients of their fundamental groups among all 3-manifold groups. To do this, we upgrade a result of Liu to show that the topological type of a fiber is detected by the profinite completion of the fundamental group of a fibered 3-manifold.