On composition of torsors
Abstract
Let K be a field, let X be a connected smooth K-scheme and let G, H be two smooth connected K-group schemes. Given Y → X a G-torsor and Z → Y an H-torsor, we study whether one can find an extension E of G by H so that the composite Z → X is an E-torsor. We give both positive and negative results, depending on the nature of the groups G and H.
| Origin | Files produced by the author(s) |
|---|