Timeline for Is the image of an $S$-arithmetic subgroup under a surjective $k$-morphism $S$-arithmetic?
Current License: CC BY-SA 3.0
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| when toggle format | what | by | license | comment | |
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| Jul 4, 2016 at 17:53 | answer | added | nfdc23 | timeline score: 9 | |
| Jul 4, 2016 at 14:10 | comment | added | Jim Humphreys | I'm not sure what can be said in the positive characteristic case, but even in characteristic 0 you probably need to be more specific about the nature of $G$ and $H$. For example, what happens when $G$ is connected reductive, with a (proper, nontrivial) semisimple derived group, while $H$ is just a torus? Or what if $G$ is solvable but not reductive? | |
| Jul 4, 2016 at 11:46 | history | asked | JGR | CC BY-SA 3.0 |