8 citations · 35 across the 20 of their papers we have counts for
Showing 2020Show all
3 papers · 1 filter
math.AG2020★ 2 cited
Moret-Bailly families and non-liftable schemes
Damian Roessler, Stefan Schröer
Generalizing the Moret-Bailly pencil of supersingular abelian surfaces to higher dimensions, we construct for each field of characteristic p>0 a smooth projective variety with triv…
math.AG2020
Rigidified torsor cocycles, hypercoverings and bundle gerbes
Stefan Schröer
We give a geometric interpretation of sheaf cohomology for higher degrees n in terms of torsors on the member of degree d=n-1 in hypercoverings of type r=n-2, endowed with an addit…
math.AG2020
There is no Enriques surface over the integers
Stefan Schröer
We show that there is no family of Enriques surfaces over the ring of integers. This extends non-existence results of Minkowski for families of finite étale schemes, of Tate and Og…