Timeline for Formality of Sullivan Representatives
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Feb 24, 2023 at 4:42 | comment | added | kelly maggs | Thanks - that's exactly what I was looking for! | |
| Feb 23, 2023 at 16:20 | comment | added | Aleksandar Milivojević | Suciu recently wrote a very nice survey article arxiv.org/abs/2210.08310 which discusses results on formality of maps as well, see Section 10.4. An example of a non-formal map is given by the Hopf bundle $S^3 \to S^2$. The effect of the map on rational homotopy is non-trivial (iso on $\pi_3$), while on cohomology it is trivial, so one cannot model the map using only the cohomology. | |
| Feb 23, 2023 at 12:37 | history | asked | kelly maggs | CC BY-SA 4.0 |