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Responsabili:

Federica Galluzzi  ed  Elena Martinengo
 

Nel calendario si indicano i seminari di geometria algebrica e altre attività di interesse, organizzate dall'Università e dal Politecnico di Torino.

Evento

Titolo: Biextensions and biadditive morphisms
Quando: 07/05/2014 - 15:00
Dove: Palazzo Campana - TORINO
Aula: Aula C
Relatore: Ettore Aldrovandi
Afferenza: Florida State University
Locandina: Locandina

Descrizione:

Abstract In the context of abelian groups, Biextensions are biadditive morphisms (Z-bilinear maps) what extensions are homomorphisms. We extend the notion of biextension to monoidal categories (and stacks) with only mild commutativity assumptions. The goal is to classify additive bifunctors of such objects in a way analogous to how one classifies additive functors.
(Equivalently, in this way one obtains a derived bifunctor in the context of the nonabelian derived category.) Applications and motivations stem from the theory of categorical rings and mod 2 phenomena that distinguish various cohomology theories of rings. If time permits we will illustrate some of these applications.

Sede

Sede: Palazzo Campana - Sito web
Indirizzo: Via Carlo Alberto 10
CAP: 10123
Città: TORINO