Timeline for Cohomology of Flag Varieties
Current License: CC BY-SA 2.5
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 19, 2010 at 20:03 | comment | added | Leonid Positselski | Oh, so this is called the Iwasawa decomposition. I used to know this, but it was a long time ago. | |
| Apr 19, 2010 at 5:34 | comment | added | Torsten Ekedahl | One way of getting this isomorphism is that it is a special case of the Iwasawa decomposition for a general semi-simple (real) Lie group. This allows us to get many specific references, Helgason for instance. | |
| Apr 19, 2010 at 1:11 | comment | added | Allen Knutson | Oddly, in the infinite-dimensional case the most relevant map is the other way, and is only a homotopy equivalence, as one can read about in [Pressley-Segal] "Loop Groups". | |
| Apr 17, 2010 at 21:22 | history | answered | Leonid Positselski | CC BY-SA 2.5 |