On Unramified Brauer Groups of Torsors over Tori
On Unramified Brauer Groups of Torsors over Tori
In this paper we introduce a method to obtain algebraic information using arithmetic one in the study of tori and their principal homogeneous spaces. In particular, using some results of the authors with Ting-Yu Lee, we determine the unramified Brauer groups of some norm one tori, and their torsors.