Timeline for Singular cohomology and birational equivalence
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 7, 2016 at 17:23 | vote | accept | David C | ||
| Nov 5, 2016 at 19:00 | answer | added | ACL | timeline score: 11 | |
| Nov 5, 2016 at 15:57 | answer | added | R. van Dobben de Bruyn | timeline score: 13 | |
| Nov 5, 2016 at 14:36 | answer | added | Donu Arapura | timeline score: 8 | |
| Nov 5, 2016 at 14:02 | comment | added | R. van Dobben de Bruyn | Also, the Brauer group is a birational invariant of smooth projective varieties, which Artin and Mumford use in the second half of their article to reinterpret and generalise the results of the first half. | |
| Nov 5, 2016 at 13:57 | comment | added | R. van Dobben de Bruyn | The spaces $H^0(X,\Omega^i_X)$ and $H^i(X,\mathcal O_X)$ are birational invariants in arbitrary characteristic! (The former is an exercise in Hartshorne, and the latter follows in characteristic $0$ from Hodge symmetry, and in characteristic $p$ from a paper by Chatzistamatiou and Rülling.) | |
| Nov 5, 2016 at 11:52 | comment | added | Piotr Achinger | the fundamental group is another example | |
| Nov 5, 2016 at 11:30 | history | asked | David C | CC BY-SA 3.0 |