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Unlikely Intersections of Curves with Algebraic Subgroups in Semiabelian Varieties

Number Theory 2022-09-20 v3 Algebraic Geometry

Abstract

Let GG be a semiabelian variety and CC a curve in GG that is not contained in a proper algebraic subgroup of GG. In this situation, conjectures of Pink and Zilber imply that there are at most finitely many points contained in the so-called unlikely intersections of CC with subgroups of codimension at least 22. In this note, we establish this assertion for general semiabelian varieties over Qˉ\bar{\mathbb{Q}}. This extends results of Maurin and Bombieri, Habegger, Masser, and Zannier in the toric case as well as Habegger and Pila in the abelian case.

Keywords

Cite

@article{arxiv.2108.12405,
  title  = {Unlikely Intersections of Curves with Algebraic Subgroups in Semiabelian Varieties},
  author = {Fabrizio Barroero and Lars Kühne and Harry Schmidt},
  journal= {arXiv preprint arXiv:2108.12405},
  year   = {2022}
}

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