Torsion points of elliptic curves over large algebraic extensions of finitely generated fields

Wulf Dieter Geyer*, Moshe Jarden

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The following Theorem is proved:Let K be a finitely generated field over its prime field. Then, for almost all e-tuples (σ)=(σ 1, ..., σ e)of elements of the abstract Galois group G(K)of K we have: (a) If e=1, then E tor(K(σ))is infinite. Morover, there exist infinitely many primes l such that E(K(σ))contains points of order l. (b) If e≧2, then E tor(K(σ))is finite. (c) If e≧1, then for every prime l, the group E(K(σ))contains only finitely many points of an l-power order. Here K(σ) is the fixed field in the algebraic closure K of K, of σ 1, ..., σ e, and "almost all" is meant in the sense of the Haar measure of G(K).

Original languageEnglish
Pages (from-to)257-297
Number of pages41
JournalIsrael Journal of Mathematics
Volume31
Issue number3-4
DOIs
StatePublished - Sep 1978

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