Uniformly rigid spaces and Néron models of formally finite type

Details Uniformly rigid spaces and Néron models of formally finite type Uniformly rigid spaces and Néron models of formally finite type

2010-03-04

arxiv.org/abs/1003.1022v1

Mathematics

Algebraic Geometry

182 pages, PhD thesis (WWU M\"unster)

Scientific paper

We introduce a new category of non-archimedean analytic spaces over a complete discretely valued field. These spaces, which we call uniformly rigid, may be viewed as classical rigid-analytic spaces together with an additional uniform structure: On the level of points, a uniformly rigid space coincides with its underlying rigid space, while its G-topology is coarser and its sheaf of holomorphic functions is smaller. A uniformly rigid structure is, locally, induced by an integral formal model of formally finite type. In fact, Berthelot's generic fiber functor factors naturally through the category of uniformly rigid spaces. The uniformly rigid generic fiber of a quasi-compact formal scheme of formally finite type is quasi-compact, and its global functions are bounded. We construct our new category by starting out from semi-affinoid algebras and nested rational coverings; we prove a uniformly rigid acyclicity theorem, and we study coherent modules. We then define formal N\'eron models for uniformly rigid spaces to be smooth formal schemes of formally finite type satisfying the universal N\'eron property. We establish the existence of formal N\'eron models for certain classes of uniformly rigid groups, and we discuss applications to Chai's program concerning the computation of the base change conductor for abelian varieties with potentially multiplicative reduction. This paper is a faithful copy of the author's doctoral thesis.

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