Timeline for Pre-images of unipotent elements in $\operatorname{SL}_{n}(A)$
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 27, 2013 at 13:17 | vote | accept | Olivier | ||
| Nov 27, 2013 at 13:17 | history | edited | Olivier | CC BY-SA 3.0 |
Added a small clarification
|
| Nov 25, 2013 at 14:26 | comment | added | YCor | Just to indicate why this is not in contradiction with my answer: in Tim's example, $A=\mathbf{Z}_5[\zeta_5]$, and $\mathfrak{m}$ is generated by $\{5,\zeta_5-1\}$. In his examples, lifts of elements of order 5 are conjugate (at least over an extension) to the matrix $\begin{pmatrix}\zeta_5 & 1\\0 & \zeta_5^{-1}\end{pmatrix}$, which is not unipotent. | |
| Nov 23, 2013 at 17:21 | comment | added | Jim Humphreys | Can you say more explicitly what you mean by "unipotent" element in a matrix group? | |
| Nov 23, 2013 at 11:22 | history | answered | Tim Dokchitser | CC BY-SA 3.0 |