Timeline for Obstruction to a $SU(4)$-structure in eight dimensions
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Feb 15, 2015 at 4:09 | history | edited | Qiaochu Yuan | CC BY-SA 3.0 |
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| Feb 15, 2015 at 2:17 | comment | added | Qiaochu Yuan | Oh, I'm sure the real topologists and geometers know the answer. That class in $H^8(X, \pi_7 F)$ might just be the class $p_1^2 - 4 p_2 + 8 e$ that appears in your question (and in particular it would be consistent with what little I know about the unstable homotopy groups of these spaces that $\pi_7 F \cong \mathbb{Z}$). | |
| Feb 15, 2015 at 0:48 | comment | added | Bilateral | Thanks for the answer, I will think about at it. Could it be possible that this is an open question in mathematics? | |
| Feb 14, 2015 at 22:53 | history | answered | Qiaochu Yuan | CC BY-SA 3.0 |