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On a theorem of Tate

Fedor Bogomolov, Yuri Tschinkel (2008)

Open Mathematics

We study applications of divisibility properties of recurrence sequences to Tate’s theory of abelian varieties over finite fields.

On Brody and entire curves

Jörg Winkelmann (2007)

Bulletin de la Société Mathématique de France

We discuss an example of an open subset of a torus which admits a dense entire curve, but no dense Brody curve.

On coverings of simple abelian varieties

Olivier Debarre (2006)

Bulletin de la Société Mathématique de France

To any finite covering f : Y X of degree d between smooth complex projective manifolds, one associates a vector bundle E f of rank d - 1 on X whose total space contains Y . It is known that E f is ample when X is a projective space ([Lazarsfeld 1980]), a Grassmannian ([Manivel 1997]), or a Lagrangian Grassmannian ([Kim Maniel 1999]). We show an analogous result when X is a simple abelian variety and f does not factor through any nontrivial isogeny X ' X . This result is obtained by showing that E f is M -regular in the...

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