Timeline for When do 27 lines lie on a cubic surface?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Feb 18, 2017 at 19:32 | vote | accept | Gro-Tsen | ||
| Dec 19, 2016 at 16:08 | comment | added | Gro-Tsen | Indeed, I miscounted (135 is the number of pairs of intersecting lines, so it counts every tritangent plane three times). Fixed. | |
| Dec 19, 2016 at 16:07 | history | edited | Gro-Tsen | CC BY-SA 3.0 |
fix the number of tritangent planes (45, not 135) as per comments
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| Dec 19, 2016 at 16:06 | answer | added | Gro-Tsen | timeline score: 19 | |
| Dec 16, 2016 at 12:38 | comment | added | Jason Starr | I agree with Dima Pasechnik: there are 45 2-planes that intersect the cubic surface in a "triangle", not 135. | |
| Dec 16, 2016 at 0:19 | comment | added | Dima Pasechnik | there is something I don't understand in the last paragraph: in the configuration of the 27 lines on the cubic there are just 45 points of (triple) intersection, not 135. | |
| Dec 15, 2016 at 13:38 | history | asked | Gro-Tsen | CC BY-SA 3.0 |