Fabio Tonini: Representations of the Nori fundamental group and variants
Tid: On 2018-11-21 kl 13.15 - 15.00
Föreläsare: Fabio Tonini (University of Florence)
Plats: Room 3418, KTH
Abstract: The Nori fundamental group scheme of a scheme X is a profinite group scheme that "controls" torsors over X under finite group schemes.
In the talk I will describe its category of representations by considering vector bundles with extra structure. I will also talk about a variant of this group, the local fundamental group scheme.
In the first part I will recall some notions about group schemes, torsors and Tannaka duality.