Timeline for Cofinality of infinitesimals
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
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| Apr 4, 2020 at 15:36 | comment | added | Andreas Blass | @MonroeEskew When I first started to think about your question, my feeling was that regularity of $U$ is just what you'd need to get $\mu>\kappa$, Unfortunately, my attempt to prove it had a gap (euphemism for "it was wrong"), and I still don't see how to fix it. | |
| Mar 29, 2020 at 18:43 | comment | added | Asaf Karagila♦ | @Monroe: Very clearly, if ZFC is consistent, it has a countable model, so all the cardinals there are countable by definition! There is no such thing as uncountable cardinals. | |
| Mar 29, 2020 at 17:34 | comment | added | Monroe Eskew | Thanks! What about for uncountable $\kappa$? Does it hold in ZFC that $\mu>\kappa$ for regular $U$? | |
| Mar 29, 2020 at 16:44 | history | answered | Andreas Blass | CC BY-SA 4.0 |