# Displays and $p$-divisible groups

• ### Thomas Zink

Universität Bielefeld, Germany

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## Abstract

The theory of displays is a Dieudonné theory for formal $p$-divisible groups which is an equivalence of categories over an arbitrary $p$-adic ring. Over a more restricted class of rings one obtains a classification of all $p$-divisible groups. We explain basic ideas and some recent results of this theory. The last paragraph ameliorates the discussion of isogenies of displays found in the literature.