Non-commutative resolutions of linearly reductive quotient singularities
arXiv:2304.14711 · doi:10.1093/qmath/haae033
Abstract
We prove existence of non-commutative crepant resolutions (in the sense of van den Bergh) of quotient singularities by finite and linearly reductive group schemes in positive characteristic. In dimension two, we relate these to resolutions of singularities provided by G-Hilbert schemes and F-blowups. As an application, we establish and recover results concerning resolutions for toric singularities, as well as canonical, log terminal, and F-regular singularities in dimension 2.
20 pages, minor changes, comments welcome!