Timeline for Simplest example of jumping of cohomology of structure sheaf in smooth families?
Current License: CC BY-SA 3.0
13 events
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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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| Jul 26, 2011 at 17:22 | answer | added | Christian Liedtke | timeline score: 5 | |
| Jul 26, 2011 at 16:58 | comment | added | Ravi Vakil | @Junkie: thanks! Gradworks charges money, so I won't get the thesis. My library has access to Compositio, so at least I have access to that. I still would argue for posting on the arXiv, which would allow everyone with internet access the opportunity to see Junecue Suh's work. | |
| Jul 26, 2011 at 2:34 | comment | added | Junkie | There is no need for arXiv: gradworks.umi.com/32/56/3256586.html The first of three sections is also journals.cambridge.org/article_S0010437X08003527 | |
| Jul 25, 2011 at 16:50 | comment | added | Ravi Vakil | @Qiaochu: thanks! I've edited the "counterexamples" sentence following your suggestion. Please let me know if it could use further improvement. About the Lefschetz principle: I will frankly admit that I don't know what it is as a precise mathematical statement (beyond elimination of quantifiers), which likely reflects my own ignorance. See point 3 at the end of <a href="math216.wordpress.com/2011/07/21/seventeenth-post/… post</a> for more of my thoughts on this. As I state there, perhaps I should ask this on MathOverflow. | |
| Jul 25, 2011 at 16:44 | history | edited | Ravi Vakil | CC BY-SA 3.0 |
added 58 characters in body
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| Jul 25, 2011 at 13:11 | comment | added | Qiaochu Yuan | The introduction to the question is mildly confusing. Does "ill-defined" mean that the Lefschetz principle is false? How can you show something if you also know counterexamples to it? (Perhaps you meant to say "I'm aware of a number of counterexamples in positive characteristic," since this is what you say later on, but again the introduction is mildly confusing as it stands to a spectator like me.) | |
| Jul 25, 2011 at 7:38 | answer | added | Torsten Ekedahl | timeline score: 9 | |
| Jul 23, 2011 at 14:10 | comment | added | Ravi Vakil | Thanks Matt! Junecue should post his thesis on the arXiv... | |
| Jul 22, 2011 at 4:45 | answer | added | Torsten Ekedahl | timeline score: 13 | |
| Jul 22, 2011 at 3:27 | answer | added | Sándor Kovács | timeline score: 7 | |
| Jul 21, 2011 at 23:50 | comment | added | Emerton | Dear Ravi, This answer may be relevant: math.stackexchange.com/questions/51146/… Junecue Suh's thesis contains examples (I think), but I can't find it online. Cheers, Matt | |
| Jul 21, 2011 at 18:19 | history | asked | Ravi Vakil | CC BY-SA 3.0 |