Generalized Serre--Tate Ordinary Theory

Details Generalized Serre--Tate Ordinary Theory Generalized Serre--Tate Ordinary Theory

2002-08-28

arxiv.org/abs/math/0208216v4

Mathematics

Algebraic Geometry

189 pages. Shorten the abstract. Rewritten the introduction. Up-dated the main text

Scientific paper

We study a generalization of Serre--Tate theory of ordinary abelian varieties and their deformation spaces. This generalization deals with abelian varieties equipped with additional structures. The additional structures can be not only an action of a semisimple algebra and a polarization, but more generally the data given by some ``crystalline Hodge cycles'' (a $p$-adic version of a Hodge cycle in the sense of motives). Compared to Serre--Tate ordinary theory, new phenomena appear in this generalized context. We give an application of this theory to the existence of ``good'' integral models of those Shimura varieties whose adjoints are products of simple, adjoint Shimura varieties of $D_l^{\bf H}$ type with $l\ge 4$.

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