Vladimir Drinfeld

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math.AG2025

Ring stacks conjecturally related to the stacks $B T_{n}^{G, μ}$

Vladimir Drinfeld

Using the ring space of sheared Witt vectors, we define certain ring stacks. We suggest several models for the ring stacks. Motivation: there is a conjectural description of the st…

math.AG2023

Toward Shimurian analogs of Barsotti-Tate groups

Vladimir Drinfeld

We first recall Grothendieck's notion of n-truncated Barsotti-Tate group. Such groups form an algebraic stack over the integers. The problem is to give an illuminating description…

Ring stacks conjecturally related to the stacks BTnG,μ​

Toward Shimurian analogs of Barsotti-Tate groups

Ring stacks conjecturally related to the stacks $B T_{n}^{G, μ}$