English

Small points and free abelian groups

Number Theory 2017-05-09 v1

Abstract

Let FF be an algebraic extension of the rational numbers and EE an elliptic curve defined over some number field contained in FF. The absolute logarithmic Weil height, respectively the N\'eron-Tate height, induces a norm on FF^* modulo torsion, respectively on E(F)E(F) modulo torsion. The groups FF^* and E(F)E(F) are free abelian modulo torsion if the height function does not attain arbitrarily small positive values. In this paper we prove the failure of the converse to this statement by explicitly constructing counterexamples.

Cite

@article{arxiv.1408.4915,
  title  = {Small points and free abelian groups},
  author = {Robert Grizzard and Philipp Habegger and Lukas Pottmeyer},
  journal= {arXiv preprint arXiv:1408.4915},
  year   = {2017}
}
R2 v1 2026-06-22T05:35:23.426Z