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.

Innehållsansvarig:David Rydh
Tillhör: Institutionen för matematik
Senast ändrad: 2018-11-18