Timeline for meaning of $k$-rational for closed subschemes
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 21, 2015 at 10:44 | answer | added | Matthieu Romagny | timeline score: 2 | |
| Jun 21, 2015 at 4:58 | vote | accept | zyx | ||
| Jun 20, 2015 at 13:58 | comment | added | Will Sawin | A $k$-rational subscheme of $X_{\overline {k}}$ is just asubscheme of $X_{k}$ basechanged to $\overline{k}$. | |
| Jun 20, 2015 at 8:09 | answer | added | Daniel Loughran | timeline score: 2 | |
| Jun 19, 2015 at 23:03 | comment | added | R.P. | I do not think there is such a notion (at least not one which is in more or less common use). But one can generalize the concept of rational point in various ways, for example one could define rational subvarieties of $X$ as geometrically integral subschemes $Z$ of $X$ (in which case a rational subvariety of dimension $0$ of $X$ is indeed a rational point on $X$). Of what use this definition would be is of course another question... | |
| Jun 19, 2015 at 19:29 | review | First posts | |||
| Jun 19, 2015 at 19:49 | |||||
| Jun 19, 2015 at 19:26 | history | asked | zyx | CC BY-SA 3.0 |