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Lukas Braun will speak on

Local Cox rings for klt singularities

Abstract: In this talk, I will define Cox rings for (klt)
singularities. Different questions arise: What is a good model for a
singularity in this context? How do the models relate? Is the iteration
of Cox rings well-defined? What is a meaningful notion of finite
generation in the local case? The talk is based on joint work with
Joaquin Moraga (Princeton).