This is a reading group on the new approach to resolution of singularities, due to Abramovich, Temkin, Wlodarcyzk, https://arxiv.org/pdf/1906.07106.pdf.
Resolution of singularities used to be a fundamental result (due to Hironaka) that everyone used and had to spend years to fully understand but whose proof hardly anyone had read. The situation got much better in the early 2000s: efforts by various people made the proof more conceptual, and in the end a comprehensible summary could fit into a book. Well, things got even better this year, with a new approach that just takes 20 pages. The
only disadvantage second advantage of the new approach is that along the way we can learn about weighted blowups (which are also more efficient in practice), and see stacks in action: everything becomes equivariant with respect to finite group actions.
This seminar will meet Mondays at 1pm in JCMB 5327.
Igor Dolgachev http://dept.math.lsa.umich.edu/~idolga/weighted82.pdf
Miles Reid https://homepages.warwick.ac.uk/~masda/surf/more/grad.pdf
Timothy Hosgood https://arxiv.org/abs/1604.02441