Generalized relative Manin–Mumford conjecture

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Let π:A→S\pi:A\rightarrow S be an Abelian scheme over an irreducible complex variety SS, and let Y⊂AY\subset A be irreducible and dominate SS. Let Ytor≥rY_{\mathrm{tor}}^{\geq r} denote the set of irreducible components of YtorY_{\mathrm{tor}} of dimension at least rr. Suppose that

r+dim⁡A>dim⁡Y+dim⁡S.r+\dim A > \dim Y+\dim S.

If Ytor≥rY_{\mathrm{tor}}^{\geq r} is Zariski dense in YY, then YY is contained in a proper torsion coset.

Generalized relative Manin–Mumford conjecture. Under these hypotheses, YY is contained in a proper torsion coset.

This is presented as a generalized version of the Relative Manin–Mumford conjecture, with the case r=0r=0 identified with that conjecture. The source does not specify a resolution status for the generalized statement.

References

Primary source

Pietro Corvaja, Jacob Tsimerman and Umberto Zannier, “Finite Orbits in Surfaces with a Double Elliptic Fibration and Torsion Values of Sections”, arXiv:2302.00859 (2023).

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