Timeline for If $(X,\tau)$ has more than $1$ point and is $T_2$ and connected, do we have $|X| =|\tau|$?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 8, 2019 at 12:55 | history | edited | Pietro Majer | CC BY-SA 4.0 |
m
|
| May 8, 2019 at 7:05 | comment | added | YCor | is "line for the origin" a typo? | |
| May 21, 2018 at 17:24 | comment | added | Joel David Hamkins | This example is essentially like the star graph, with $\kappa$ many edges joined at a single point. There is a similarity with the long line example: with the long line, you have $\kappa$ many unit intervals joined end-to-end, but with the star graph, you join them only on one side, letting them otherwise float freely from one another. | |
| May 21, 2018 at 14:32 | comment | added | Pietro Majer | (any $\mathbb{R}$ linear space in place of $\mathbb{R}^2$ would also work, for examples of higher cardinality) | |
| May 21, 2018 at 14:21 | vote | accept | Dominic van der Zypen | ||
| May 21, 2018 at 14:13 | history | answered | Pietro Majer | CC BY-SA 4.0 |