Bergeron–Venkatesh–Lück torsion growth conjecture for 3-manifolds
Bergeron–Venkatesh–Lück torsion growth conjecture for 3-manifolds
Let be a compact connected orientable and irreducible -manifold with infinite fundamental group and empty or toroidal boundary. A cofinal tower of regular finite-sheeted covers is a sequence
of regular finite-sheeted covers whose corresponding subgroups are cofinal. Let be the hyperbolic pieces in the JSJ decomposition of . Bergeron–Venkatesh–Lück conjecture. Then admits such a tower for which
This conjecture predicts that torsion in first homology grows at a rate determined by the total volume of the hyperbolic JSJ pieces. The supplied text attributes it to influential work of Bergeron–Venkatesh and Lück but gives no resolution, so its status is left open.
Sources & referencesView supporting material
Primary source
Jonathan Fruchter, “Virtual homological torsion: abundance versus growth in books of I-bundles”, arXiv:2509.22052 (2025).
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