3 papers
math.RT2025
Reducedness of twisted loop groups
Zhiyuan Ding
We give an elementary proof of the reducedness of twisted loop groups along the lines of the Kneser-Tits problem.
math.AG2018
Construction of certain rational functions on the moduli stack of Drinfeld shtukas
Zhiyuan Ding
We construct certain rational functions (modular units) on the moduli stack of Drinfeld shtukas. The divisors of these rational functions are supported on horospherical divisors of…
math.AG2018
A toy model of shtukas
Zhiyuan Ding
Motivated by the question of constructing certain rational functions (modular units) on the moduli stack of Drinfeld shtukas, we introduce the notion of toy shtukas. We prove basic…