Profinite rigidity conjecture for cusped hyperbolic 3-manifolds
Profinite rigidity conjecture for cusped hyperbolic 3-manifolds
Let be a cusped hyperbolic -manifold, and let be a compact, orientable -manifold. The manifolds are profinally rigid when any isomorphism between their profinite fundamental groups forces the manifolds to be homeomorphic.
Profinite rigidity conjecture. Every cusped hyperbolic -manifold is profinitely rigid among compact, orientable -manifolds.
The conjecture is motivated by profinite detection of Dehn fillings and by the many known examples of profinitely rigid cusped hyperbolic -manifolds. The source presents the general assertion as a conjecture and gives no resolution.
Sources & referencesView supporting material
Primary source
Xiaoyu Xu, “Profinite rigidity witnessed by Dehn fillings of cusped hyperbolic 3-manifolds”, arXiv:2412.05229 (2026).
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