Timeline for Geometric interpretation of Cusps for general groups?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 1, 2015 at 13:22 | vote | accept | Spencer Leslie | ||
| Feb 28, 2015 at 12:32 | answer | added | Matthias Wendt | timeline score: 2 | |
| Feb 27, 2015 at 2:12 | comment | added | user40276 | See dept.math.lsa.umich.edu/~lji/head.pdf from page 391. In page 392, there is something similar to Matthias comment. The boundary face of a parabolic subgroup $e (P)$ collapses the unipotent radical. | |
| Feb 25, 2015 at 22:55 | comment | added | Spencer Leslie | @MatthiasWendt, could you please expand on this? I googled the Borel-Serre compactification, but it is unclear to me what you mean, and this sounds very interesting | |
| Feb 25, 2015 at 21:18 | comment | added | Matthias Wendt | For groups of rank $\geq 2$, the boundary of the locally symmetric space has more structure. The exact relation between the structure of "the cusp at infinity" and the unipotent radicals of parabolic subgroups is captured exactly by the Borel-Serre compactification. This is a manifold with corners, where the corners are built exactly from unipotent radicals of parabolic subgroups. | |
| Feb 25, 2015 at 17:52 | history | edited | Spencer Leslie | CC BY-SA 3.0 |
added 12 characters in body
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| Feb 25, 2015 at 17:37 | history | asked | Spencer Leslie | CC BY-SA 3.0 |