Displays and -divisible groups
Thomas ZinkUniversität Bielefeld, Germany
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The theory of displays is a Dieudonné theory for formal -divisible groups which is an equivalence of categories over an arbitrary -adic ring. Over a more restricted class of rings one obtains a classification of all -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.