English

Non-isogenous abelian varieties sharing the same division fields

Number Theory 2021-08-11 v1 Algebraic Geometry

Abstract

Two abelian varieties A1,A2A_1, A_2 over a number field KK are called strongly iso-Kummerian if the torsion fields K(A1[d])K(A_1[d]) and K(A2[d])K(A_2[d]) coincide for all d1d \geq 1. For all g4g \geq 4 we construct geometrically simple, strongly iso-Kummerian gg-dimensional abelian varieties over number fields that are not geometrically isogenous. We also discuss related examples and put significant constraints on any further iso-Kummerian pair.

Keywords

Cite

@article{arxiv.2108.04270,
  title  = {Non-isogenous abelian varieties sharing the same division fields},
  author = {Davide Lombardo},
  journal= {arXiv preprint arXiv:2108.04270},
  year   = {2021}
}

Comments

22 pages, includes some unpublished parts of arXiv:1402.1478. Comments are very welcome!

R2 v1 2026-06-24T04:57:53.756Z