Timeline for Characterization of torsors which are locally trivial in terms of descent
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 10, 2017 at 11:11 | comment | added | HeinrichD | So is this question answered? | |
| Jan 19, 2017 at 16:05 | comment | added | მამუკა ჯიბლაძე | Yes I believe it does | |
| Jan 19, 2017 at 15:55 | comment | added | Arrow | @მამუკაჯიბლაძე Doesn't pullback along effective descent morphisms always reflect isomorphisms? | |
| Jan 19, 2017 at 14:52 | comment | added | მამუკა ჯიბლაძე | One direction is clear - take $p=\alpha$. In the other, I think it is enough to require of $p$ that $p^*$ reflects isomorphisms: if $p^*\alpha$ has a global section then it can be used to provide an inverse for $p^*(G\times A\to A\times_BA)$, so the latter is an isomorphism. | |
| Jan 19, 2017 at 13:11 | history | asked | Arrow | CC BY-SA 3.0 |