Timeline for map of manifolds inducing iso on top cohomology, but not surjective on one other cohomology group
Current License: CC BY-SA 2.5
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 1, 2010 at 18:39 | vote | accept | user6960 | ||
| Jun 29, 2010 at 15:02 | comment | added | Allen Knutson | E.g. let $M = {\mathbb CP}^2$, and collapse the line at infinity to a point, mapping to $S^4$. | |
| Jun 29, 2010 at 14:09 | history | answered | Tilman | CC BY-SA 2.5 |