English

Unlikely intersections with isogeny orbits in a product of elliptic schemes

Number Theory 2020-07-27 v2 Algebraic Geometry

Abstract

Fix an elliptic curve E0E_0 without CM and a non-isotrivial elliptic scheme over a smooth irreducible curve, both defined over the algebraic numbers. Consider the union of all images of a fixed finite-rank subgroup (of arbitrary rank) of E0gE_0^g, also defined over the algebraic numbers, under all isogenies between E0gE_0^g and some fiber of the gg-th fibered power A\mathcal{A} of the elliptic scheme, where gg is a fixed natural number. As a special case of a slightly more general result, we characterize the subvarieties (of arbitrary dimension) inside A\mathcal{A} that have potentially Zariski dense intersection with this set. In the proof, we combine a generalized Vojta-R\'emond inequality with the Pila-Zannier strategy.

Keywords

Cite

@article{arxiv.1902.01323,
  title  = {Unlikely intersections with isogeny orbits in a product of elliptic schemes},
  author = {Gabriel Andreas Dill},
  journal= {arXiv preprint arXiv:1902.01323},
  year   = {2020}
}

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36 pages