RéGA
# Sebastian Bartling - 15h30 - Br(X)=Br´(X) for separated unions of two affines (after Gabber and Lieblich).

→
Europe/Paris

Zoom
#### Zoom

https://zoom.us/j/97172991924?pwd=bVZkRmJKdENUQk4xVGh0VklBRlFvdz09

Description

Gabber proved in his thesis the following beautiful theorem: If $X$ is

the separated union of two affine schemes, then the Brauer group

agrees with the cohomological Brauer group. Later Lieblich gave in his

thesis a rather slick new proof using the theory of twisted sheaves.

In this talk I want to sketch Lieblich’s proof and if time permits

I´ll explain why I got interested in this statement.