Small points and free abelian groups
Number Theory
2017-05-09 v1
Abstract
Let be an algebraic extension of the rational numbers and an elliptic curve defined over some number field contained in . The absolute logarithmic Weil height, respectively the N\'eron-Tate height, induces a norm on modulo torsion, respectively on modulo torsion. The groups and 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}
}