Timeline for Questions Suggested by the Parabolic Subgroup Definition
Current License: CC BY-SA 2.5
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 11, 2010 at 18:12 | vote | accept | Jean Delinez | ||
| May 30, 2010 at 23:33 | comment | added | BCnrd | Apart from the topological motivation that for Hausdorff topological gp $G$ and subgp $H$ the quotient $G/H$ is Hausdorff precisely when $H$ is closed in $G$, perhaps (i) may sound better in view of the following fact: if $f:H \rightarrow G$ is a homomorphism between finite type group schemes over a field $k$ and $\ker f = 1$ in the scheme-theoretic sense (i.e., $f$ is injective on $R$-valued points for all $k$-algebras $R$, or $f$ is a functorial monomorphism) then $f$ is necessarily a closed immersion. Thus, (ii) is essentially meaningless in any reasonable algebro-geometric sense. | |
| May 30, 2010 at 18:05 | answer | added | S. Carnahan♦ | timeline score: 2 | |
| May 30, 2010 at 13:33 | answer | added | Jim Humphreys | timeline score: 3 | |
| Feb 8, 2010 at 16:42 | answer | added | Victor Ostrik | timeline score: 8 | |
| Feb 8, 2010 at 16:28 | answer | added | Mike Skirvin | timeline score: 5 | |
| Feb 8, 2010 at 8:23 | history | asked | Jean Delinez | CC BY-SA 2.5 |