Timeline for Choice sets in "thick" sets of sets
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 25, 2017 at 6:26 | answer | added | Bjørn Kjos-Hanssen | timeline score: 1 | |
| Nov 14, 2017 at 13:57 | history | edited | Dominic van der Zypen | CC BY-SA 3.0 |
added 8 characters in body
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| Nov 9, 2017 at 4:25 | comment | added | Asaf Karagila♦ | @Péter: Isn't it easier to consider the tail segments of the ordinal $\kappa+1$, with the exception of $\{\kappa\}$, with the choice set being just $\{\kappa\}$ itself? | |
| Nov 8, 2017 at 8:06 | comment | added | Dominic van der Zypen | Thanks...! Should I delete the question or do you want to post this as an answer? | |
| Nov 8, 2017 at 7:28 | comment | added | Péter Komjáth | Are you sure that this is what you want? Seems easy: one has to construct functions $f_\alpha:\kappa\to\kappa$ ($\alpha<\kappa$) such that each $f_\alpha$ attains 0 at exactly one point and for any pair $(\xi,\eta)\in \kappa\times \kappa$ there are $\kappa$ many $f_\alpha$ such that $f_\alpha(\xi)=\eta$. This can be done by bookkeeping. | |
| Nov 8, 2017 at 7:07 | history | asked | Dominic van der Zypen | CC BY-SA 3.0 |