14 citations · 51 across the 17 of their papers we have counts for
Showing 2021Show all
3 papers · 1 filter
math.AG2021★ 2 cited
Torsors over the Rational Double Points in Characteristic
Christian Liedtke, Gebhard Martin, Yuya Matsumoto
We study torsors under finite group schemes over the punctured spectrum of a singularity in positive characteristic. We show that the Dieudonné module of the (loc,loc)-par…
math.AG2021★ 6 cited
Linearly Reductive Quotient Singularities
Christian Liedtke, Gebhard Martin, Yuya Matsumoto
We study isolated quotient singularities by finite and linearly reductive group schemes (lrq singularities for short) and show that they satisfy many, but not all, of the known pro…
math.AG2021
Automorphism groups of rational elliptic and quasi-elliptic surfaces in all characteristics
Igor Dolgachev, Gebhard Martin
We study the groups of automorphisms of rational algebraic surfaces that admit a relatively minimal pencil of curves of arithmetic genus one over an algebraically closed field of a…