Timeline for Conflict-free coloring of $\mathbb{R}$ with the Euclidean topology
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 23, 2022 at 6:56 | comment | added | Alessandro Codenotti | @bof that's a nice way to write it, thanks! I struggled to find a concise way to say what I wanted | |
| Feb 23, 2022 at 6:52 | vote | accept | Dominic van der Zypen | ||
| Feb 23, 2022 at 0:07 | comment | added | bof | More concisely, if an infinite $T_1$ space is coloured with finitely many colours, consider an infinite open set with a minimum number of colours, and delete a "uniquely coloured" point to get a contradiction. | |
| Feb 22, 2022 at 22:20 | comment | added | Alessandro Codenotti | Really all I'm saying without making it harder than it has to be is that there is a point $x_1$ with a unique colour in $\Bbb R$, so there is $x_2$ with a unique colour in $\Bbb R\setminus\{x_1\}$, so there is $x_3$ with a unique colour in $\Bbb R\setminus\{x_1,x_2\}$ and all those points have different colours. | |
| Feb 22, 2022 at 22:14 | history | edited | Alessandro Codenotti | CC BY-SA 4.0 |
added 1063 characters in body
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| Feb 22, 2022 at 21:56 | history | answered | Alessandro Codenotti | CC BY-SA 4.0 |