Timeline for Birational correspondences and codimension where not an isomorphism
Current License: CC BY-SA 2.5
5 events
| when toggle format | what | by | license | comment | |
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| Apr 13, 2017 at 12:58 | history | edited | CommunityBot |
replaced http://mathoverflow.net/ with https://mathoverflow.net/
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| May 28, 2010 at 13:07 | vote | accept | A. Pascal | ||
| May 28, 2010 at 4:49 | answer | added | Torsten Ekedahl | timeline score: 4 | |
| May 28, 2010 at 3:20 | comment | added | Karl Schwede | I'm pretty sure this can basically never happen (I know there are a bunch of results for smooth 3-folds saying that small contractions like you describe can't exist). I also think they don't exist in general (as long as you demand the varieties to be smooth), but I don't recall the argument. If I remember, I'll post, or someone else... | |
| May 27, 2010 at 23:41 | history | asked | A. Pascal | CC BY-SA 2.5 |