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Commentarii Mathematici Helvetici

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Volume 84, Issue 4, 2009, pp. 835–863
DOI: 10.4171/CMH/183

Published online: 2009-12-23

Intersection de sous-groupes et de sous-variétés III

Gaël Rémond[1]

(1) Université Grenoble I, Saint-Martin-d'Hères, France

We elucidate the structure of various exceptional subsets appearing in parts I and II in order to prove new results on the Zilber–Pink conjecture for abelian varieties. In particular, we obtain boundedness of height on the intersection of interest for all non-degenerate varieties (in a precise sense). The main idea to prove that our exceptional subsets are closed comes from a result of Bombieri, Masser and Zannier on tori and we follow the same approach through so-called anomalous subvarieties but we have to allow extra generality in the definition. We also use in a crucial way a theorem of Ax on analytic subgroups of algebraic groups.

Keywords: Abelian varieties, Zilber–Pink conjecture

Rémond Gaël: Intersection de sous-groupes et de sous-variétés III. Comment. Math. Helv. 84 (2009), 835-863. doi: 10.4171/CMH/183