Timeline for Which base change preserves integrality of schemes
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 26, 2015 at 8:36 | vote | accept | Ron | ||
| Apr 25, 2015 at 15:43 | answer | added | Will Sawin | timeline score: 4 | |
| Apr 24, 2015 at 18:45 | comment | added | Ron | You can take the base to be $\mathrm{Spec} R$ for a complete DVR $R$. | |
| Apr 24, 2015 at 18:24 | comment | added | Kestutis Cesnavicius | But saying "projective space" without specifying the base doesn't make sense either. | |
| Apr 24, 2015 at 16:30 | history | edited | Ron | CC BY-SA 3.0 |
edited title
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| Apr 24, 2015 at 15:52 | comment | added | Ron | A standard use of the term "Projective scheme" is to mean a closed subscheme of a projective space. Here the morphisms are implicit, not necessary for the problem. | |
| Apr 24, 2015 at 15:42 | comment | added | Kestutis Cesnavicius | Projective is a property of a morphism, not of a scheme, so it doesn't make sense to say that $X$ and $Y$ are projective without specifying the base. | |
| Apr 24, 2015 at 14:02 | history | asked | Ron | CC BY-SA 3.0 |