Angelo Vistoli: An arithmetic valuative criterion for properness for tame stacks, and applications
Tid: To 2021-10-14 kl 14.00 - 15.00
Föreläsare: Angelo Vistoli (Scuola Normale Superiore)
Abstract: I will report on joint work in progress with Giulio Bresciani. I will present a valuative criterion for properness for tame stacks (in the sense of Abramovich, Olsson and Vistoli); although the statement will be clear to the experts, some of its consequences seem to be new, and surprising.