Timeline for Unbounded $\omega_1$-sequence in $^*\mathbb{N}$
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 18 at 18:48 | vote | accept | Sergey Grigoryants | ||
| Sep 16, 2020 at 20:38 | comment | added | nombre | @YCor Thanks, I'll try to dinf out tomorrow if the cardinal $d$ they are mentionning can indeed take any value between $\aleph_1$ and $2^{\aleph_0}$. | |
| Sep 16, 2020 at 18:32 | comment | added | YCor | You might get information about cofinality of $^*\mathbf{N}$ from projecteuclid.org/download/pdf_1/euclid.ndjfl/1093635237 | |
| Sep 16, 2020 at 18:04 | comment | added | YCor | "each $\omega_1$-sequence is bounded" literally means that the cofinality of $^*\mathbf{N}$ is $\ge\omega_2$. | |
| Sep 16, 2020 at 17:47 | history | edited | nombre | CC BY-SA 4.0 |
added 33 characters in body
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| Sep 16, 2020 at 17:46 | comment | added | nombre | @AlexKruckman I didn't even realize I wrote HC, which is indeed the french acronym for the continuum hypothesis. | |
| Sep 16, 2020 at 16:53 | comment | added | Andreas Blass | @AlexKruckman HC means CH (as in "hypothèse du continu" and probably similar things in other languages). | |
| Sep 16, 2020 at 16:47 | comment | added | Alex Kruckman | What does it mean to say HC holds? | |
| Sep 16, 2020 at 16:03 | history | answered | nombre | CC BY-SA 4.0 |