Timeline for What is the consistency strength of non-existence of outer automorphisms of Calkin algebra?
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Jul 29, 2018 at 14:45 | vote | accept | Morteza Azad | ||
| Jul 29, 2018 at 3:21 | comment | added | Morteza Azad | (+1) Interesting, Noah! Thanks for pointing out to this fact! Indeed, it is surprising that OCA has no consistency strength! By the way, due to its Ramsey-like formulation my initial guess was that it might be as strong as some Ramsey type large cardinals in the hierarchy at least! (e.g. Ramsey cardinals or weakly compacts) | |
| Jul 28, 2018 at 20:32 | history | answered | Noah Schweber | CC BY-SA 4.0 |