Abstract

Conference on Abelian varieties,
Amsterdam 29 - 31 May 2006.
We show that non-supersingular Newton polygon strata in the principally polarized case are
irreducible.
Consider the theory of foliations of an open Newton polygon stratum in the moduli space of
abelian varieties in positive characteristic. We show that any non-supersingular leaf is irreducible, and
that the
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