Timeline for Homeomorphism between del Pezzo surfaces
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Aug 23, 2016 at 15:59 | history | edited | Francesco Polizzi |
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| Aug 23, 2016 at 14:17 | vote | accept | Erick | ||
| Aug 23, 2016 at 12:54 | comment | added | abx | @Francesco Polizzi: no problem, these are not the olympic games! | |
| Aug 23, 2016 at 10:50 | history | edited | Francesco Polizzi | CC BY-SA 3.0 |
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| Aug 23, 2016 at 10:43 | comment | added | Francesco Polizzi | @abx: sorry, your comment appeared to me only after posting my answer (which says essentially the same things). | |
| Aug 23, 2016 at 10:42 | answer | added | Francesco Polizzi | timeline score: 14 | |
| Aug 23, 2016 at 10:36 | comment | added | abx | Del Pezzo surfaces of degree $d\neq 8$ form a unique family, and therefore they are even diffeomorphic. For $d=8$ one finds $\mathbb{P}^1\times \mathbb{P}^1$ and $\mathbb{P}^2$ blown up at one point, which are not homotopy equivalent (the intersection form on $H^2$ is even for the former and odd for the latter). | |
| Aug 23, 2016 at 10:17 | review | First posts | |||
| Aug 23, 2016 at 10:35 | |||||
| Aug 23, 2016 at 10:14 | history | asked | Erick | CC BY-SA 3.0 |