Seminario di Geometria Algebrica: Positivity for normal varieties

Thursday, November 14, 2013 h. 14:30 - Room 2BC30 - Stefano Urbinati


Seminario di Geometria Algebrica

Thursday, November 14, 2013 h.14:30-15:30 - Room 2BC30
Stefano Urbinati (Padova)
"Positivity for normal varieties"

A key ingredient in birational geometry is intersection theory, that gives the notion of positivity. Unfortunately intersection theory requires strong assumptions that sometimes it is necessary to avoid. In this talk we will give three different possibilities to partially overcome intersection theory for defining positivity. The first, given by Boucksom, de Fernex and Favre using b-divisors. The second through the pullback for Weil divisors introduced by de Fernex and Hacon. And the third through Okounkov bodies, a work in progress of Kuronya and Lozovanu.

Rif. Int. A.Bertapelle

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