Timeline for One question on cup product and torsion elements
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Jun 21, 2021 at 12:24 | comment | added | Michael Albanese | No worries. For those unfamiliar with the LHS spectral sequence, here's another way to verify the claim. The three-manifold described above is the total space of the Euler class $n$ circle bundle over $T^2$. It follows from the Gysin sequence that the cup product of the pullbacks of the two generators of $H^1(T^2; \mathbb{Z})$ is a non-zero torsion element of order $n$. | |
| Jun 21, 2021 at 3:07 | comment | added | Tyler Lawson | @MichaelAlbanese You're correct. Sorry for the mistake. | |
| Jun 20, 2021 at 21:05 | comment | added | Michael Albanese | I think you want $(nb)$ not $(nc)$ - the modified condition should be imposed on the top right corner of the matrix. | |
| Jun 6, 2013 at 11:30 | vote | accept | Allen | ||
| Jun 6, 2013 at 6:55 | vote | accept | Allen | ||
| Jun 6, 2013 at 11:29 | |||||
| Jun 6, 2013 at 4:39 | history | answered | Tyler Lawson | CC BY-SA 3.0 |