Timeline for Is $(\omega+1)^\omega/{\cal U}$ complete for ${\cal U}$ free ultrafilter?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 13, 2021 at 13:06 | vote | accept | Dominic van der Zypen | ||
| Dec 13, 2021 at 0:41 | comment | added | Andreas Blass | You already have two correct answers, answering considerably more than you asked. But to just answer your question negatively, it suffices to notice that the standard natural numbers (the equivalence classes mod $\mathcal U$ of the constant functions $\omega\to\omega$) have no least upper bound. | |
| Dec 12, 2021 at 16:04 | answer | added | Alex Kruckman | timeline score: 6 | |
| Dec 12, 2021 at 15:43 | comment | added | Joseph Van Name | This definition clarifies this problem. en.wikipedia.org/wiki/Complete_lattice | |
| Dec 12, 2021 at 15:23 | answer | added | Joseph Van Name | timeline score: 3 | |
| Dec 12, 2021 at 15:07 | review | Close votes | |||
| Dec 21, 2021 at 3:08 | |||||
| Dec 12, 2021 at 14:12 | history | asked | Dominic van der Zypen | CC BY-SA 4.0 |