Timeline for Sequences of groups, exact not just in étale but also in the Zariski topology
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Jul 8, 2011 at 16:06 | vote | accept | TonyS | ||
| Jul 8, 2011 at 16:06 | comment | added | TonyS | Okay. Thanks for your help. Now i have enough to read for the weekend :-). | |
| Jul 8, 2011 at 15:04 | comment | added | Daniel Bergh | Yes it is. And by definition this just means that it is a pseudo-torsor which is an epimorphism as a morphism of sheaves in the Zariski-topology. That is, it has a section Zariski locally. | |
| Jul 8, 2011 at 10:48 | comment | added | TonyS | Oh, thanks a lot. That is very helpful. Just to clarify: The map $Gl_n(B) \rightarrow i_{\*}F$ is a torsor in the Zarski-topology, that's why the sequence i'm interested in is exact in the Zariksi-topology? Is was confused because of the word obstruction. I thought this word implied that some group has to vanish for this to be true. | |
| Jul 8, 2011 at 8:10 | history | edited | Daniel Bergh | CC BY-SA 3.0 |
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| Jul 8, 2011 at 7:59 | history | edited | Daniel Bergh | CC BY-SA 3.0 |
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| Jul 8, 2011 at 7:49 | history | edited | Daniel Bergh | CC BY-SA 3.0 |
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| Jul 8, 2011 at 0:09 | history | edited | Daniel Bergh | CC BY-SA 3.0 |
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| Jul 8, 2011 at 0:02 | history | answered | Daniel Bergh | CC BY-SA 3.0 |