Timeline for Zariski-closed subgroups of ${\mathbf G}_{\mathbf a}^n$
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Feb 21, 2016 at 1:46 | vote | accept | Drike | ||
| Feb 13, 2016 at 16:00 | answer | added | nfdc23 | timeline score: 4 | |
| Feb 13, 2016 at 15:16 | comment | added | YCor | Sorry again: you mean a polynomial group automorphism, and probably should write $K^n$ instead of $G_a^n$ to avoid any ambiguity. | |
| Feb 13, 2016 at 15:14 | history | edited | Drike | CC BY-SA 3.0 |
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| Feb 13, 2016 at 15:10 | comment | added | YCor | I'd understand the question as a question about Zariski-closed connected subgroups of $K^n$, to avoid reduceness issues. (The phrasing "closed connected subgroup" is indeed misleading.) | |
| Feb 13, 2016 at 15:06 | history | edited | Drike | CC BY-SA 3.0 |
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| Feb 13, 2016 at 14:55 | comment | added | Damian Rössler | What about $\alpha_p:={\rm Spec}K[X]/X^p$? | |
| Feb 13, 2016 at 14:27 | history | edited | Drike | CC BY-SA 3.0 |
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| Feb 13, 2016 at 14:17 | comment | added | YCor | The question is a bit weird since an isomorphism of variety does not necessarily map subgroups to subgroups (so a positive answer to the question would not provide a classification of Zariski-closed subgroups of $K^n$) | |
| Feb 13, 2016 at 14:16 | comment | added | YCor | Related: mathoverflow.net/questions/230745 | |
| Feb 13, 2016 at 14:11 | history | asked | Drike | CC BY-SA 3.0 |