Monotone invariant conjecture for non-virtually-trivial circle bundles
Monotone invariant conjecture for non-virtually-trivial circle bundles
For each dimension , let assign a numerical invariant to homotopy -manifolds. The invariant is required to satisfy, for every map , the degree inequality
Monotone invariant conjecture. In every dimension , there is such a homotopy -manifold numerical invariant that is positive and finite on every circle bundle over a closed aspherical manifold with hyperbolic fundamental group that is not virtually trivial.
The conjecture is motivated by the domination semi-norm and the Seifert volume, which provide monotone invariants in related settings. The source presents this as a suggestion, and no resolution is given.
Sources & referencesView supporting material
Primary source
Christoforos Neofytidis, “On a problem of Hopf for circle bundles over aspherical manifolds with hyperbolic fundamental groups”, arXiv:1712.03582 (2022).
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