Timeline for How does one classify finite flat group schemes over a ring where p is nilpotent?
Current License: CC BY-SA 2.5
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 8, 2010 at 20:31 | answer | added | Mikhail Bondarko | timeline score: 1 | |
| Aug 1, 2010 at 22:02 | vote | accept | agamzon | ||
| Jul 30, 2010 at 20:16 | answer | added | BCnrd | timeline score: 10 | |
| Jul 30, 2010 at 20:16 | comment | added | BCnrd | OK, so then I will move my comment to an answer. | |
| Jul 30, 2010 at 19:54 | comment | added | agamzon | The base rings of interest are $W_2(k)$. By the way, I'm perfectly happy assuming $p>2$. | |
| Jul 30, 2010 at 18:42 | comment | added | Tony Scholl | Crystalline Dieudonne theory (Berthelot-Breen-Messing-De Jong) is possibly of use here. See De Jong's Berlin ICM talk for an overview. It provides a functor (finite flat group schemes) -> (Dieudonne crystals) which is faithful for reasonable base schemes. Fully faithfulness, and identifying the essential image, can delicate (in your case $p=2$ is likely to be very troublesome). Brian Conrad is likely to be able to give a much more informative answer. | |
| Jul 30, 2010 at 18:39 | comment | added | Daniel Larsson | This is an excellent question! Let's wait and see what Brian Conrad says. I have a feeling he's the go-to-guy with this question. | |
| Jul 30, 2010 at 17:18 | history | asked | agamzon | CC BY-SA 2.5 |