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arXiv · 2107.11466

A 1-dimensional formal group over the prismatization of Spf Z_p

Vladimir Drinfeld
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Abstract

Let Sigma denote the prismatization of Spf (Z_p). The multiplicative group over Sigma maps to the prismatization of the multiplicative group over Spf (Z_p). We prove that the kernel of this map is the Cartier dual of some 1-dimensional formal group over Sigma. We obtain some results about this formal group (e.g., we describe its Lie algebra). We give a very explicit description of the pullback of the formal group to the quotient of the q-de Rham prism by the action of the multiplicative group of Z_p.

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Vladimir Drinfeld. 2021-07-23. A 1-dimensional formal group over the prismatization of Spf Z_p. https://arxiv.org/abs/2107.11466

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