Timeline for algebro-geometric properties of morphisms between algebraic groups
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 31, 2013 at 13:53 | vote | accept | mmm | ||
| Jul 31, 2013 at 8:49 | vote | accept | mmm | ||
| Jul 31, 2013 at 13:53 | |||||
| Aug 17, 2011 at 21:23 | answer | added | Jim Humphreys | timeline score: 1 | |
| Aug 17, 2011 at 12:18 | history | edited | Pasha Zusmanovich |
edited tags
|
|
| Jul 7, 2011 at 19:54 | comment | added | Allen Knutson | I think it's true that any identity-preserving morphism $G \to {\mathbb G}_m$, for $G$ reductive, is a homomorphism. Certainly this is easy to prove for ${\mathbb G}_m$ itself. | |
| Jul 7, 2011 at 19:43 | history | edited | Martin Brandenburg | CC BY-SA 3.0 |
deleted 3 characters in body; edited title
|
| Jul 7, 2011 at 15:47 | comment | added | Jason Starr | It is certainly not true that this map is proper for $\textbf{GL}_r$. The fiber over the identity is the same as the space of direct sum decompositions of an $r$-dimensional vector space indexed by the $\text{n}^{\text{th}}$ roots of unity. | |
| Jul 7, 2011 at 14:46 | history | asked | mmm | CC BY-SA 3.0 |