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3 votes

Global Sections of the Identity Component of Neron model

I will have to wait for a more reasonable hour to give a complete answer, but I believe this paper of mine -- joint with X. Xarles -- is relevant to your question. Most of it works in the case of an …
Pete L. Clark's user avatar
11 votes
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Torsion of an abelian variety under reduction.

Let me try again at an alternate answer. If $A_{\mathbb{Z}_p}$ is an abelian scheme of dimension $g$ and $\ell \neq p$ is a prime, then for any positive integer $n$, the isogeny $[\ell^n]: A \rightar …
Pete L. Clark's user avatar