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math.AG2021★ 1 cited
A 1-dimensional formal group over the prismatization of Spf Z_p
Vladimir Drinfeld
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 kerne…
math.CT2021★ 1 cited
On a notion of ring groupoid
Vladimir Drinfeld
By a ring groupoid we mean an animated ring whose i-th homotopy groups are zero for all i>1. In this expository note we give an elementary treatment of the (2,1)-category of ring g…