Descente de torseurs, gerbes et points rationnels - Descent of torsors, gerbes and rational points

Stephane Zahnd

Let $k$ be a field of characteristic 0 and $G$ a linear algebraic $k$-group. When $G$ is abelian, it is well known that torsors under $G_X$ over a $k$-scheme $π:X\to \textup{Spec…