Timeline for On intersections of exceptional divisors
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
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| Apr 7, 2022 at 20:30 | comment | added | Jana | @EvgenyShinder and abx: Thanks for your comments. | |
| Apr 7, 2022 at 16:39 | comment | added | abx | See What's the cohomology ring structure of a blow-up?. | |
| Apr 7, 2022 at 11:32 | comment | added | Evgeny Shinder | By projection formula this vanishing holds if $\pi_*(E^i) = 0$ in Chow groups; this must be the case when $i$ is less than codimension of the center of the blowup. On the other hand, when $n = 3$, $i = 2$ and we blow up a curve, the answer is not necessary zero (it is roughly degree of the curve). | |
| Apr 7, 2022 at 10:12 | history | asked | Jana | CC BY-SA 4.0 |