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research article

On the Reduction of Points on Abelian Varieties and Tori

Perucca, Antonella
2011
International Mathematics Research Notices

Let G be the product of an abelian variety and a torus defined over a number field K. Let R-1, ..., R-n be points in G(K). Let l be a rational prime, and let a(1), ..., a(n) be nonnegative integers. Consider the set of primes p of K satisfying the following condition: the l-adic valuation of the order of (R-i mod p) equals a(i) for every i = 1, ..., n. We show that this set is either finite or has a positive natural density. We characterize the n-tuples a(1), ..., a(n) for which the density is positive. More generally, we study the l-part of the reduction of the points.

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Type
research article
DOI
10.1093/imrn/rnq080
Web of Science ID

WOS:000286472400003

Author(s)
Perucca, Antonella
Date Issued

2011

Published in
International Mathematics Research Notices
Start page

293

End page

308

Subjects

Linear-Dependence

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Order

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Maps

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
TAN  
Available on Infoscience
December 16, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/74514
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