Timeline for Etale site is useful - examples of using the small fppf site?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 1, 2013 at 2:23 | vote | accept | LMN | ||
| Jan 1, 2013 at 2:23 | history | bounty ended | LMN | ||
| Dec 31, 2012 at 4:56 | comment | added | LMN | anon, Thanks a lot for your comments! | |
| Dec 31, 2012 at 4:41 | comment | added | anon | Crystalline cohomology is a Weil cohomology, which explains its importance, but is not very useful for the things I mentioned in my answer. There are relations between flat cohomology and crystalline cohomology, but they are rather complicated to explain. As far as I know, only for the Zariski topology, the etale topology, and topologies in between, do we have a really explicit description of the "points". | |
| Dec 28, 2012 at 18:51 | comment | added | LMN | Thanks for your comments anon! I thought that Crystalline cohomology is "THE" cohomology theory to pick up things in characteristic $p$. Is there an easy comparison you can give between fppf and crystalline cohomology? | |
| Dec 28, 2012 at 18:24 | history | answered | anon | CC BY-SA 3.0 |