Timeline for Constructing Complicated Borel Subgroups of Polish Groups
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Sep 7, 2022 at 12:56 | comment | added | Alessandro Codenotti | Tangentially related, what is the ¨surjectively universal two-sided invariant group¨ mentioned in Conjecture 4.1 of the aforementioned Hjorth paper? He gives Becker-Kechris as a reference but I cannot seem to find anything relevant in it | |
| Sep 2, 2022 at 1:29 | comment | added | Danielle Ulrich | It is apparently open whether or not every Polish group admits Polishable (hence Borel) subgroups of arbitrarily high Borel rank, but this is known for abelian Polish groups (Hjorth, "Subgroups of Abelian Polish Groups.") That proof is definitely not uniform | |
| Sep 1, 2022 at 22:17 | history | edited | Danielle Ulrich | CC BY-SA 4.0 |
Solved original question, modified it
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| Sep 1, 2022 at 22:06 | history | edited | LSpice | CC BY-SA 4.0 |
DOIs; names of articles; de-proxied link
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| Sep 1, 2022 at 21:53 | history | asked | Danielle Ulrich | CC BY-SA 4.0 |