Timeline for Is there such a thing as the sigma-completion of a Boolean algebra?
Current License: CC BY-SA 2.5
6 events
| when toggle format | what | by | license | comment | |
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| Nov 25, 2010 at 10:39 | comment | added | Neil Strickland | @Todd: yes, I am referring to the Corollary at the bottom of Johnstone's page 108 and the associated remarks on page 109, which cover essentially the same ground as your discussion with Joel below. | |
| Nov 25, 2010 at 0:16 | vote | accept | Phil Wild | ||
| Nov 24, 2010 at 23:51 | comment | added | Todd Trimble | Apropos of what, Neil? Are you referring to the corollary at the bottom of the page? It is not a morphism of complete Boolean algebras, although it is I reckon an answer to one of OP's questions (where the extension need not preserve countable joins). | |
| Nov 24, 2010 at 23:31 | comment | added | Neil Strickland | ... but the link I mention below gives a completion functor with a useful adjointness property, albeit not the most obvious one. | |
| Nov 24, 2010 at 23:12 | history | edited | Todd Trimble | CC BY-SA 2.5 |
added further pertinent information
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| Nov 24, 2010 at 23:05 | history | answered | Todd Trimble | CC BY-SA 2.5 |