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On Primitive and Realisable Classes
Published online by Cambridge University Press: 04 December 2007
Abstract
Let S be a scheme, and let G be a finite, flat, commutative group scheme over S. In this paper we show that (subject to a mild technical assumption) every primitive class in Pic(G) is realisable. This gives an affirmative answer to a question of Waterhouse. We also discuss applications to locally free classgroups and to Selmer groups of Abelian varieties.
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- © 2001 Kluwer Academic Publishers