Timeline for An exercise in Jech's Set Theory
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Apr 13, 2017 at 12:58 | history | edited | CommunityBot |
replaced http://mathoverflow.net/ with https://mathoverflow.net/
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| Aug 25, 2011 at 21:40 | history | edited | Joel David Hamkins | CC BY-SA 3.0 |
added 24 characters in body; added 1 characters in body
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| Aug 25, 2011 at 21:38 | comment | added | Joel David Hamkins | Stefan, yes, I'll correct that. | |
| Aug 25, 2011 at 20:40 | comment | added | Stefan Geschke | Joel, the Balcar-Franek theorem applies to complete Boolean algebras. The finite-cofinite algebra on the integers has only countably many ultrafilters. | |
| Aug 25, 2011 at 18:19 | comment | added | Joel David Hamkins | You're welcome; it was my pleasure. | |
| Aug 25, 2011 at 18:02 | history | edited | Joel David Hamkins | CC BY-SA 3.0 |
added 354 characters in body
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| Aug 25, 2011 at 17:58 | vote | accept | Stefan Hoffelner | ||
| Aug 25, 2011 at 17:51 | comment | added | Joel David Hamkins | Nevertheless, both $F$ and $G$ "converge" to $r$ in the sense of $A$, because they each contain all rational intervals containing $r$, but in $B$ the filter $F$ actually contains the singleton, while $G$ contains the complement of the singleton. | |
| Aug 25, 2011 at 17:42 | history | answered | Joel David Hamkins | CC BY-SA 3.0 |