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math.AG2003★ 3 cited
A note on group actions on algebraic stacks
Matthieu Romagny
We give the basic definitions of group actions on (algebraic) stacks, and prove the existence of fixed points and quotients as (algebraic) stacks.
math.AG2002
The stack of Potts curves and its fibre at a prime of wild ramification
Matthieu Romagny
In this article we study the modular properties of a family of cyclic coverings of P^1 of degree N, in all odd characteristics. We compute the moduli space of the corresponding alg…