Algebraic Geometry Seminar
Christian Liedtke
Technical University Munich
Quotient singularities in positive characteristic
Abstract: We study isolated quotient singularities by finite group schemes in positive characteristic. We compute invariants, study the uniqueness of the quotient presentation, and compute some deformation spaces. A special emphasis is laid on the dichotomy between quotient singularities by linearly reductive group schemes and by group schemes that are not linearly reductive. We essentially classify the linearly reductive ones, give applications, and make some conjectures. This is joint work with Gebhard Martin (Bonn) and Yuya Matsumoto (Tokyo).
Monday November 29, 2021 at 2:00 PM in Zoom