Timeline for Are complex-oriented ring spectra determined by their formal group law?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Apr 27 at 4:55 | history | edited | Eric Peterson | CC BY-SA 4.0 |
edited body
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| Sep 2, 2021 at 3:49 | vote | accept | kiran | ||
| Sep 2, 2021 at 1:08 | comment | added | Eric Peterson | Irakli also comments: these kinds of counterexamples are not possible in $R$-modules where $R_*$ is of global dimension 1, as a universal coefficient spectral sequence can be used to decompose modules into sums of quotients by homotopy elements. This rules out the possibility of similar examples using $KU$ or $ku/p$ in place of $ku$. Bearing this in mind, $ku$ is among the simplest ring spectra with larger homotopy global dimension, so it makes sense to begin a search here. | |
| Sep 1, 2021 at 21:12 | history | edited | Eric Peterson | CC BY-SA 4.0 |
once more be careful about what \beta denotes
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| Sep 1, 2021 at 20:55 | comment | added | Eric Peterson | Intentional: a bare $\mathbb F_2$ is a graded abelian group concentrated in degree $0$, and $\Sigma^n \mathbb F_2$ is a graded abelian group concentrated in degree $n$, whereas $H \mathbb F_2$ is a spectrum. | |
| Sep 1, 2021 at 19:31 | comment | added | მამუკა ჯიბლაძე | Are $\Sigma^*\mathbb F_2$ instead of $\Sigma^*H\mathbb F_2$ intentional or just a typo? | |
| Sep 1, 2021 at 19:18 | history | edited | Eric Peterson | CC BY-SA 4.0 |
no, really, use beta to mean one thing
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| Sep 1, 2021 at 18:45 | history | edited | Eric Peterson | CC BY-SA 4.0 |
don't use beta to mean two things
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| Sep 1, 2021 at 18:37 | history | answered | Eric Peterson | CC BY-SA 4.0 |