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Fabio Tonini: Representations of the Nori fundamental group and variants

Time: Wed 2018-11-21 13.15 - 15.00

Location: Room 3418, KTH

Participating: Fabio Tonini (University of Florence)

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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.

Belongs to: Stockholm Mathematics Centre
Last changed: Nov 18, 2018