Timeline for Del Pezzo surfaces and homotopy groups of spheres
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Mar 20, 2020 at 23:20 | comment | added | Evgeny Shinder | Maybe one thing to add is that Hirzebruch surfaces, that is $\mathbf{P}^1$-bundles over $\mathbf{P}^1$ all have the form $\mathbf{F_n} = \mathbf{P}(\mathcal{O}+\mathcal{O}(n))$, $n \in \mathbf{Z}$, and their diffeomorphism type depends only on $n \mod{2}$: map.mpim-bonn.mpg.de/Hirzebruch_surfaces Finally, $\mathbf{F}_0 = \mathbf{P}^1 \times \mathbf{P}^1$ and $\mathbf{F}_1 = Bl_{x}(\mathbf{P^2})$. | |
| S Sep 8, 2015 at 22:37 | history | answered | Will Sawin | CC BY-SA 3.0 | |
| S Sep 8, 2015 at 22:37 | history | made wiki | Post Made Community Wiki by Will Sawin |