Timeline for Homogeneous components of Cox RIngs
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 8, 2022 at 11:12 | comment | added | Ben McKay | Did Prince Albert have a Cox ring, or merely an Albert algebra? | |
| Nov 8, 2022 at 9:40 | comment | added | Luca Francone | Yes thanks I forgot to ask $O_X(U)$ factorial, which implies that the Picard group of $U$ is trivial. I edited the question. | |
| Nov 8, 2022 at 9:38 | history | edited | Luca Francone | CC BY-SA 4.0 |
added 26 characters in body
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| Nov 7, 2022 at 19:14 | answer | added | Balazs | timeline score: 2 | |
| Nov 7, 2022 at 12:25 | comment | added | Jason Starr | The hypotheses that you write do not imply that the Picard group is generated by the Cartier divisors $D_i$. For instance, let $X$ be a smooth projective curve of genus $g>0$ and let $U$ be the complement of one rational point. You need to assume that the Picard group of $U$ is trivial to get your conclusion. | |
| Nov 7, 2022 at 10:54 | history | asked | Luca Francone | CC BY-SA 4.0 |