Timeline for Invariant differential forms on commutative group schemes are closed!?
Current License: CC BY-SA 3.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 22, 2022 at 21:08 | comment | added | David E Speyer | A comment on a very old answer: Let $k$ be a field of characteristic $p$ and let $G$ be $\mathbb{A}^2_k$ as a scheme, with group operation $(x_1, y_1) \ast (x_2, y_2) = (x_1+x_2, y_1+y_2+x_1 x_2^p)$. This is not commutative, but the Lie algebra is commutative. | |
| Sep 11, 2011 at 14:03 | history | answered | Torsten Ekedahl | CC BY-SA 3.0 |