Timeline for Is the automorphism group of free group of rank two relatively hyperbolic?
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
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| Apr 22, 2021 at 17:42 | vote | accept | Sangrok Oh | ||
| Apr 22, 2021 at 17:41 | vote | accept | Sangrok Oh | ||
| Apr 22, 2021 at 17:41 | |||||
| Apr 20, 2021 at 16:33 | history | became hot network question | |||
| Apr 20, 2021 at 14:59 | answer | added | AGenevois | timeline score: 7 | |
| Apr 20, 2021 at 10:52 | comment | added | Sam Nead | Ah, good catch. I decided to be bold - I edited the the question to fix the typo and I added a ref to [BDM, Theorem 9.2]. | |
| Apr 20, 2021 at 10:45 | history | edited | Sam Nead | CC BY-SA 4.0 |
fix mistake... add ref
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| Apr 20, 2021 at 10:40 | history | edited | Sam Nead | CC BY-SA 4.0 |
fix mistake...
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| Apr 20, 2021 at 9:20 | comment | added | HJRW | There appears to be a serious typo in the question, however: Behrstock, Drutu and Mosher, showed that these groups are NOT (properly) relatively hyperbolic. | |
| Apr 20, 2021 at 9:18 | comment | added | HJRW | @DerekHolt: People sometimes talk about groups have a "proper" relatively hyperbolic structure, meaning that they are hyperbolic relative to some proper subgroup. (Of course, every group is hyperbolic relative to itself!) The question of whether $\mathrm{Aut}(F_2)$ has a proper relatively hyperbolic structure is perfectly meaningful. (As Sam Nead points out, the answer is "no".) | |
| Apr 20, 2021 at 8:26 | comment | added | Derek Holt | Sorry to be pedantic, but I thought that groups had to be hyperbolic relative to a specified subgroup, so what does it mean to ask whether $G$ is relatively hyperbolic? Is the subgroup somehow understood? | |
| Apr 20, 2021 at 6:33 | history | edited | YCor |
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| Apr 20, 2021 at 5:56 | answer | added | Sam Nead | timeline score: 6 | |
| Apr 20, 2021 at 5:19 | history | edited | Sam Nead | CC BY-SA 4.0 |
formatting
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| Apr 20, 2021 at 4:51 | history | edited | Sam Nead | CC BY-SA 4.0 |
Formatting
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| Apr 20, 2021 at 3:16 | history | asked | Sangrok Oh | CC BY-SA 4.0 |