Timeline for Nefness on a K3 surface
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 7, 2021 at 16:14 | comment | added | Alex M. | @user875280: It seems that you have gone on an editing spree recently. Kindly please stop editing posts only to perform minor corrections. Thank you. | |
| S Apr 7, 2021 at 15:34 | history | suggested | user875280 | CC BY-SA 4.0 |
Add the subject of a sentence
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| Apr 7, 2021 at 15:00 | review | Suggested edits | |||
| S Apr 7, 2021 at 15:34 | |||||
| Nov 16, 2013 at 18:44 | vote | accept | Heitor | ||
| Nov 12, 2013 at 23:55 | comment | added | Sándor Kovács | Jason, you are of course correct in general, but on a K3 if there are no $(-2)$ curves, then the cone of curves is the same as the (closure of the) ample cone and the same as the positive part of the cone defined by $D^2\geq 0$ so for any $D$ with $D^2\geq 0$ $D$ or $-D$ is nef and so with the additional assumption that $-D$ is not effective or not nef, it follows that it is enough to check on $(-2)$-curves (because there is nothing to check). :) | |
| Nov 12, 2013 at 21:10 | answer | added | Sándor Kovács | timeline score: 5 | |
| Nov 12, 2013 at 17:08 | vote | accept | Heitor | ||
| Nov 12, 2013 at 17:12 | |||||
| Nov 12, 2013 at 14:12 | answer | added | Abhinav Kumar | timeline score: 3 | |
| Nov 12, 2013 at 12:38 | comment | added | Jason Starr | What if there are no $(-2)$-curves? A very general polarized K3 surface over $\mathbb{C}$ contains no smooth rational curve. | |
| Nov 12, 2013 at 12:35 | history | asked | Heitor | CC BY-SA 3.0 |