Timeline for "Universal" connected spaces
Current License: CC BY-SA 3.0
7 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 11, 2015 at 9:50 | vote | accept | Dominic van der Zypen | ||
| Aug 11, 2015 at 9:12 | answer | added | Eric Wofsey | timeline score: 8 | |
| Aug 11, 2015 at 8:49 | comment | added | Goldstern | $\kappa+1$ usually means $\kappa\cup \{\kappa\}$, or in order theoretic terms: the order of $\kappa$ (viewed as an ordinal), extended by an additional top element. | |
| Aug 11, 2015 at 8:09 | comment | added | Nate Eldredge | Is $\kappa + 1$ here meant to be the least cardinal larger than $\kappa$, or what? | |
| Aug 11, 2015 at 8:01 | comment | added | Eric Wofsey | You really don't want to ask for $f$ to be injective, at least if you aren't putting any restrictions on $X$. If you do, then it is easy to see that $T_1$ choices of $X$ force $\kappa+1$ to be $T_1$ but non-$T_1$ choices of $X$ force $\kappa+1$ to be non-$T_1$. | |
| Aug 11, 2015 at 7:38 | history | asked | Dominic van der Zypen | CC BY-SA 3.0 |