On the Rank of Abelian Varieties Over Ample Fields

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Arno Fehm - , Tel Aviv University (Author)
  • Sebastian Petersen - (Author)

Abstract

A field K is called ample if every smooth K-curve that has a K-rational point has infinitely many of them. We prove two theorems to support the following conjecture, which is inspired by classical infinite rank results: Every non-zero Abelian variety A over an ample field K which is not algebraic over a finite field has infinite rank. First, the Z((p))-module A(K) circle times Z((p)) is not finitely generated, where p is the characteristic of K. In particular, the conjecture holds for fields of characteristic zero. Second, if K is an infinite finitely generated field and S is a finite set of local primes of K, then every Abelian variety over K acquires infinite rank over certain subfields of the maximal totally S-adic Galois extension of K. This strengthens a recent infinite rank result of Geyer and Jarden.

Details

Original languageEnglish
Pages (from-to)579-586
Number of pages8
Journal International journal of number theory
Volume6
Issue number3
Publication statusPublished - May 2010
Peer-reviewedYes
Externally publishedYes

External IDs

Scopus 77952871914

Keywords

Keywords

  • Abelian variety, Ample field, Infinite rank

Library keywords