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math.AG2023
A relation between zip stacks and moduli stacks of truncated local shtukas
Qijun Yan
Let \(G\) be a reductive group over a field \(k\), and let \(μ\) be a cocharacter of \(G\). We prove that Viehmann's double coset spaces associated with \((G, μ)\) are representabl…
math.AG2021
An alternative construction of zip period maps for Shimura varieties
Qijun Yan
Let be the special fibre of a Shimura variety of Hodge type, with good reduction at a place above . We give an alternative construction of the zip period map for , which…