Alessandro De Stefani: Measuring singularities with Frobenius, Mini-course, Part IV

In the fourth lecture, I will survey a few more results on Hilbert–Kunz multiplicities and F-signature, and present a way to define such invariants for rings that are not necessarily local. This last part is based on recent joint work with Thomas Polstra and Yongwei Yao (https://arxiv.org/abs/1608.08580).