Timeline for Behavior of invariants under reduction mod p
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 2, 2020 at 14:50 | comment | added | user125639 | Thanks very much for the link! | |
| Jul 2, 2020 at 14:49 | vote | accept | user125639 | ||
| Jul 2, 2020 at 8:11 | answer | added | Wilberd van der Kallen | timeline score: 5 | |
| Jul 2, 2020 at 7:22 | comment | added | Wilberd van der Kallen | If a reductive group is split over $\mathbb{F}_p$ and acts as such on a module, then a root subgroup fixes a weight vector if and only if the $\mathbb{F}_p$ points of the root subgroup fix the vector. | |
| Jul 2, 2020 at 7:17 | comment | added | Wilberd van der Kallen | Compare mathoverflow.net/questions/350590/…. | |
| Jul 2, 2020 at 6:27 | history | edited | user125639 | CC BY-SA 4.0 |
added 18 characters in body
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| Jul 2, 2020 at 4:16 | comment | added | user125639 | Algebraic action. Regarding (2), I'm still referring to the statement for "sufficiently large $p$". | |
| Jul 2, 2020 at 3:56 | comment | added | LSpice | Also, how does the averaging in (2) work for orbits of size divisible by $p$? | |
| Jul 2, 2020 at 3:56 | comment | added | LSpice | Do you mean just an abstract action of $G(\mathbb Z)$, or an algebraic action of $G$? | |
| Jul 2, 2020 at 2:33 | history | asked | user125639 | CC BY-SA 4.0 |